This is my take on Darth Zannah and hopefully this will highlight all of her abilities and skills. So without further adieu, respect the Dark Lady of the Sith.

Accolades

Darth Bane senses Zannah's strength in the Force when she is just a little kid:

He could feel the power of the Force burning in her, fueled by grief and rage and hatred. Even if he hadn't sensed it, the broken Jedi at her feet gave mute testament to her abilities.

Source: Path of Destruction

Bane notes that there was power in Zannah:

There was power in the child.

Source: Rule of Two

Bane notes that Zannah is strong in the Force:

The Dark Lord had chosen her for one reason, and one reason only.

"You are strong in the Force," he explained, his voice still betraying no hint of emotion or the agony he endured.

Source: Rule of Two

Zannah, even as a child, was powerful, cunning, and intelligent:

She had shown not only her power, but also her intelligence and cunning.

Source: Rule of Two

Bane tells her she has the potential to surpass him:

"You have the potential to surpass me," he continued.

Source: Rule of Two

Hetton calls her perceptive as well as powerful:

"You are perceptive as you are powerful."

Source: Rule of Two

Zannah showed an incredible affinity for the Force:

She had embraced his lessons and had shown an incredible affinity for the Force.

Source: Dynasty of Evil

Force Powers

Force Augmentation/Force Speed/Dark Rage

Zannah, after having only one lesson in the Force, was able to use the Force to allow her to keep up with Darth Bane's running pace after she was being continually left behind:

She sprang up and scurried after him, moving almost effortlessly at a full run. He quickened his pace as his apprentice fell into step behind him, easily able to keep up now that she was propelled by the awesome power of the Force.

Source: Rule of Two

She uses the Force to increase her senses to supernatural levels:

Every muscle and nerve in her body was tingling with the power of the Force, her senses heightened to supernatural levels.

Source: Dynasty of Evil

She uses the Force to augment her speed, moving so fast the landscape seemed like a blur:

She'd used her newfound talents in the Force to propel herself along, running so fast that the world passed by her in a blur of wind and color.

Source: Rule of Two

She uses the Force to increase her speed again:

Her entire body was infused with the Force, her legs propelling her along so fast the wind caused her hair to stream out behind her.

Source: Dynasty of Evil

She flips back ten meters:

She parried a sharp descending blow, gathered her feet under her, and launched herself backward, flipping ten meters clear.

Source: Rule of Two

Using her precognitive abilities, Zannah is able to deflect two point blank blaster shots, sending the second one back into the shooters face:

After three failed passes, the tattooed man threw his blade down in frustration and scooped up Cyndra's fallen blaster. He took aim and fired twice from point-blank range, but Zannah didn't even flinch.

Using the precognitive awareness of the Force, she was easily able to anticipate the incoming shots and intercept them with the crackling crimson blades of her lightsaber. The first bolt ricocheted harmlessly up into he ceiling; the second she sent back at Paak.

It struck him square between the eyes, leaving a smoking hole in his forehead. His body went rigid, then toppled over backward.

Source: Rule of Two

Darth Bane has taught Zannah to take the most possible of probabilities that she sees, granted to her from her precognitive abilities of the Force, and prepare for them and use them to anticipate an opponent's move before it happened:

Zannah braced herself for his next assault. In her mind the next few seconds played out in a thousand different scenarios, each unique in its specific details, each a vision of a possible future glimpsed through the power of the Force. The sheer number of possibilities could be overwhelming, but Bane had trained her well. Instinctively, she collapsed the matrix of probabilities into the most likely outcomes, effectively allowing her to anticipate and react to her opponent's next move even before it happened.

Source: Dynasty of Evil

She uses the Force to navigate a room in total darkness:

Extinguishing her glow rod, she moved in perfect darkness back toward the main entrance, letting the Force guide her path.

Source: Dynasty of Evil

Zannah, still a child with only one lesson from Bane, uses the Force to rejuvenate herself:

Behind him he felt Zannah gather the Force once more. This time, however, the girl directed it inward, using the it to refresh and rejuvenate her exhausted limbs.

Source: Rule of Two

Telepathy/Empathy/Willpower

Before any training in the Force, Zannah is able to communicate with a Bouncer named Laa:

Laa never actually spoke to her; she only heard the words inside her head. They communicated through the power of the Force, Laa had once explained to her.

Source: Path of Destruction

Zanah nudges the minds of a group of separatists to make them more emotional and aggressive:

At the same time, she reached out with the Force to touch the minds of everyone in the room. It was possible to use the dark side to dominate another's will, but that would not serve her purpose here. The effects of mental domination would begin to fade after a few hours. By the time of Chancellor Valorum's arrival, any direct influence she exerted over Kel and his friends would be completely gone.

Zannah preferred a more subtle and insidious approach. Instead of using the Force to bend them to her will, she was gently prodding their collective psyche, pushing their thought patterns to make them more emotional, more aggressive. By itself the process was useless, but combined with persuasive words to further stir the blood, the effects could be more powerful----and more permanent----than the brute force of simple mind control.

Source: Rule of Two

She nudges the will of a Rodian so that he would be inclined to tell her what she wanted:

As she did so, she reached out with a gentle push of the Force, nudging the bartender's will ever so slightly so he would be more inclined to tell her what she wanted.

Source: Dynasty of Evil

Still untrained, she senses fear in another kid:

She could actually sense the fear emanating from him.

Source: Rule of Two

Zannah overpowers Darth Bane in a battle of wills when he tried to use Essence Transfer to take over her body. She would beat him, but would have a small part of him imprinted on her afterwards:

Everything went black. Blind and alone, he felt the void closing in. In desperation he reached out with his left hand, clutching Zannah's wrist as she lay on the ground beneath him. With his last act, he summoned all his remaining power and invoked the ritual of essence transfer.

Working at the speed of thought, his mind tapped into the currents of the Force, seizing on the power of the dark side, spinning, shaping, and twisting it into the intricate patterns he had ripped from Andeddu's Holocron.

The cold darkness swallowing him up vanished, replaced by a searing burst of crimson light as the power of the ritual was unleashed, Bane was aware of his flesh being utterly consumed by the unimaginable heat, reduced to ashes in a thousandth of a second. But he was no longer a part of his own body. His spirit had discarded it like an old shell in favor of a new one.

Bane was suddenly fully aware of his physical surroundings. He could see with Zannah's eyes, he could hear with her ears. He could feel the intense heat of the ritual's crimson glow through her skin. But Zannah was still there, too. She sensed his assault; he could feel her terror and confusion as if they were his own. And when she screamed in horror he screamed with her.

The black tendrils vanished as her concentration was shattered, disappearing like smoke on the wind. Instinctively, she fought to repel the invader.

Bane could feel her pushing him away, rejecting him, trying to drive him out even as he relentlessly tried to force his way in and snuff out her existence.

It became a battle of wills, their two identities locked together inside Zannah's mind, grappling for possession of her body. They teetered on the precipice of the void, Bane seeking to obliterate all trace of her identity while she sought to cast him down into the blackness.

For a moment they seemed to be evenly matched, neither gaining nor giving ground. And then suddenly it was over.

...

Knowing how insane her words would sound, Cognus hesitated before asking, "Lord Bane?"

"Bane is gone," the woman replied, her voice confident and strong. "I am Darth Zannah, Dark Lord of the Sith and your new Master."

. . .

She couldn't help but notice that, as she was speaking, Zannah was continually clenching and unclenching the fingers of her left hand.

Source: Dynasty of Evil

Force Concealment Aura

Zannah can create an aura around her to make herself unnoticed and unremembered from weak-minded beings who see her:

She had also wrapped herself in a faint aura of insignificance, an illusion of the dark side that allowed her to hide in plain sight when she ventured out in public. It wouldn't shield her from the eyes of anyone looking for her, but as long as she didn't draw attention to herself she would remain unnoticed and unremembered by the vast majority of weak-minded common folk.

Source: Rule of Two

Force Shield/Barrier

Zannah unconsciously shielded her bouncer friend Laa from the effects of the Brotherhood's Force Storm before she had any training in the Force:

The fires had killed most of the other bouncers. The survivors had all gone mad. All except Laa. Somehow Rain had saved her. She'd used the Force, shielding them both from the burning death and destruction, though she wasn't quite sure how she'd done it. It had just sort of . . . happened.

Source: Path of Destruction

She instinctively throws up a barrier to protect her from Bane's telekinetic assault that would have crushed her bones:

Bane hit her with a powerful Force throw, sending her hurtling backward. Only the barrier she had instinctively thrown up at the last second to shield herself saved her bones from being shattered by the concussive force of the impact.

Source: Rule of Two

She throws up a barrier to protect her from Set Harth's Force attack:

Set fired out a sharp burst of dark side power in a shimmering wave designed to knock her from her feet. Zannah easily countered by throwing up a protective energy barrier, the simplest and most effective way for one Force-user to defend against the attacks of another.

Source: Dynasty of Evil

She creates a barrier to protect herself from the effects of a demolition charge:

She recognized it as the casing of a demolition charge just in time to throw herself backward, using the Force to shield herself from the worst of the explosion.

Source: Dynasty of Evil

Telekinesis

As a kid before any training in the Force, Zannah was able to kill two Jedi by snapping their necks:

She was still screaming when the first Jedi ran up to her. "Are you okay, little one?" he asked, reaching down.

Instinctively, she lashed out at him. She didn't know how she did it; it wasn't even a conscious thought. She only knew he had shot her friend. He had killed Laa!

"What's the mat----" His voice was cut short as she snapped his neck with the Force. The eyes of his companion went wide with horror, but before he could do anything else she had broken his neck, too.

Source: Path to Destruction

Zannah, with little training in the Force, disintegrates her cousin Tomcat's hand faster than Bane can react:

He dropped his hand casually to his lightsaber, but before he could ignite his weapon, Zannah reacted. Just as she had done when she had broken the necks of the unfortunate Jedi who had accidentally killed her friend, the girl unleashed a wave of unstoppable dark side energy. She acted on pure instinct, drawing on her natural affinity for the Force with no forethought, preparation, or even training.

It happened so quickly Bane never even had a chance to put up his guard . . . but the attack wasn't directed at him. The right hand of the boy she had called Tomcat----her cousin and childhood friend----disintegrated. With a mere thought she obliterated everything below his wrist: flesh, bone and tendon vanished in a bloody explosion, leaving only a ragged stump.

Source: Rule of Two

She pushes a man off of her, still while untrained:

He'd been expecting her to make a break for it, and he was quick. He was on her after only a few steps, tackling her from behind. He knocked her to the ground, his weight slamming her to the hard dirt. And the next instant he was flying backward through the air.

He hit the ground with a hard grunt, the wind knocked out of him as he landed on his side five meters away.

Source: Rule of Two

She calls her lightsaber to her hand:

Extending her shackled hands, she used the Force to draw the lightsaber from Hetton's lap, sending it flying across the room and into her waiting palm.

Source: Rule of Two

She snaps restraints with a single thought:

As the blades ignited she casually snapper her restraints with a single thought.

Source: Rule of Two

She pins Darovit to the bottom of her ship:

Wheeling around, Zannah reached out with the Force and yanked Darovit to the floor. He landed with a grunt, facedown at her feet.

Source: Rule of Two

She Force Choke's Darovit:

Zannah reached back with the Force, wrapping it around his windpipe. And slowly she began to squeeze. Darovit fell to his knees, his hands flying up to his throat as his oxygen was cut off.

Source: Rule of Two

She levitates Darth Bane's body waist high, carries it outside, and then onto a ship

She reached out with the Force and lifted Bane's body off the ground, levitating it at waist height.

She carried her Master this way from the fortress and outside, Darovit following closely behind her. She briefly considered which ship they should use to take them from Tython, then settled on the Loranda. In addition to being larger, it was also equipped with a full medical bay.

"Open the cargo bay," she ordered, nodding her head in the direction of the vessel.

Darovit raced ahead and did as she instructed, while Zannah slowly lifted her Master up and into the ship.

Source: Rule of Two

She uses the Force to open Caleb's secret door:

She went back into the shack, kicking the sleeping mat aside to reveal a small trapdoor in the floor. She used the Force to fling it open, and was rewarded with the sight of a man staring up at her from a small cellar.

Source: Rule of Two

She levitates Caleb and then applies pressure to his internal organs, squeezing them until he feels "agonizing pain few beings ever experienced":

She reached out with the Force and picked Caleb up. His feet dangled only a few centimeters off the floor, yet his head brushed against the shack's low, slanted roof. She began to squeeze, applying pressure directly to his internal organs, slowly crushing them as she inflicted an agonizing pain few beings had ever experienced. She was careful to leave his lungs alone, however----allowing him enough air to breath and speak.

Source: Rule of Two

Zannah sends a Force blast at Bane that, even though he threw up a Force shield to protect himself, was still strong enough to throw him against the wall and cause him to lose his breath and killed the bodyguard Lucia:

He began to gather the dark side, the power slowly building. But before he could unleash it he was hit by a wall of thunderous force rolling out from a corridor to his left. Instinctively he threw up a defensive shield, absorbing the blow. Despite this, he was slammed against the wall, knocking the breath from his lungs.

Lucia was not so fortunate. Unable to call upon the Force to protect herself, she was sent careering down the corridor, flipping and twisting. Her skull smashed against the stone half a dozen times as her body ricocheted off the walls and ceiling, reducing it to a bloody, misshapen mess. Her corpse finally tumbled to a stop thirty meters away where the hall made an abrupt ninety-degree turn.

Bane was back on his feet in an instant, turning to face his foe.

"You couldn't bring yourself to kill her," Zannah said, her voice filled with contempt.

Source: Dynasty of Evil

Force Sense

Zannah senses mercenaries two kilometers away. Bane would note that, at her age, to sense anything at all was a testament to her abilities:

"There's someone up ahead," Zannah whispered a minute later. Less attuned to the subtle nuances of the Force than her Master, it had taken her longer to sense the danger. But given her lack of training, the fact that she had noticed anything at all was testament to her abilities.

Source: Rule of Two

Zannah senses that Hetton is radiating with the power of the dark side:

Zannah suspected it was a natural confidence born of wealth and privilege, but as she was marched down the red carpet toward him, she realized it was something far more impressive: Hetton radiated with the power of the dark side!

Source: Rule of Two

She senses faint remnants of dark side energy on Hetton's artifacts:

She could still feel faint remnants of dark side energy clinging to them: fading memories of the incredible power they once contained.

Source: Rule of Two

She senses Jedi when they arrive in system in their ship:

The sight of another ship appearing over his apprentice's shoulder, still too far in the distance to make out a model or affiliation, put an end to his deliberations. An instant later he felt the unmistakable light-side power of those on board.

Zannah must have felt it too; she turned and looked in that direction, then turned back to him with a worried grimace.

Source: Rule of Two

She senses the darkness growing in Bane:

She could feel the dark side building inside him, fueled by his rage----his never-ending hatred of the Jedi; his resentment toward Darovit for exposing them; his anger at her for leading the Jedi here to Tython.

Source: Rule of Two

She senses Set Harth returning to his mansion:

Zannah froze as she felt a sudden presence within the mansion. Reaching out with the Force, she confirmed her suspicions: Set had returned from his party, and he was alone.

Source: Dynasty of Evil

Zannah senses uneasiness when she touches down on Ciutric IV, sensing that Bane has been taken captive:

As Zannah brought the Victory in to touch down in her designated hangar at the Ciutric IV starport, she felt a sudden uneasiness.

...

She couldn't shake the feeling that something was very wrong, but she had come too far to turn back now.

Source: Dynasty of Evil

Zannah senses Bane in the Stone Prison on Doan:

Reaching out with the Force, however, presented Zannah with a very different picture. She could feel something dark and powerful pulsing at the heart of the column. She recognized the presence of her Master, though from this distance it was impossible to get anything more than a vague sense that he was hidden somewhere inside.

. . .

She could feel her Master's presence deep inside the complex, drawing her forward.

. . .

The alarms continued to ring out. Zannah ignored them, focusing instead on the flashes of power she felt through the Force, each one a beacon bringing her ever closer to Bane.

. . .

She could sense his presence, his unmistakable power.

Source: Dynasty of Evil

She senses that Bane had used the dark side in his prison room a few minutes ago:

The dark side had been unleashed here only a few minutes ago. She could still feel its lingering power.

Source: Dynasty of Evil

Zannah uses the Force to locate Bane in the Stone Prison, even after he used the Force to imprint a fake impression of himself to throw her off:

Closing her eyes and blocking out the earsplitting sound of the alarms, she reached out with the Force once more. This time she ignored the powerful dark side imprint Bane had left on the guard rooms. It took only a few seconds for her to pick up his trail again. As she suspected, he was still inside the prison.

Source: Dynasty of Evil

Dark Side Tendrils

Zannah is able to manifest tendrils made out of dark side energy. They are potent enough that once they made contact with Darth Bane's arm, it was completely severed at the elbow(she has only ever performed this feat on/next to a strong dark side nexus, though):

Again she opened herself up the the dark side. This time, however, she didn't attack Bane directly. Instead, she let it flow through her, drawing it from the soil and stone of Ambria itself. She called to power buried for centuries, summoning it up to the surface in wispy tendrils of dark smoke snaking up from the sand.

The thin tendrils crawled along the ground, reaching for one another, twining themselves together into writhing tentacles each several meters long.

Then, in response to her unspoken command, the tentacles rose up and lashed out at her foe.

...

Bane saw the strange mist crawling across the dirt and knew this was no illusion. Somehow Zannah had given substance and corporeality to the dark side, transforming it into half a dozen shadowy, serpentlike minions rising up from the ground.

Suddenly the tendrils flew at him. He slashed out with his lightsaber to chop the closest one in half, but the blade simple passed through the black mist with no effect. Bane threw himself to the side, but the tip of the tentacle still brushed against his left shoulder.

The material of his clothes melted away as if it had been splashed with acid. A chunk of flesh beneath simply dissolved, and Bane screamed in agony.

Once, orbalisks had fused themselves to his body with a burning chemical compound so intense it had nearly driven him mad. Ten years ago they had been removed when Bane's flesh had been literally cooked by a concentrated blast of his own violent lightning. During her interrogation, Serra had pumped him full of a drug that had felt like it was eating him alive from the inside. But the excruciating pain he felt from the mere touch of the dark side tendril was unlike anything Bane had ever experienced before.

The damage was far from life threatening, but it nearly sent Bane into shock. He fell hard to the ground, his jaw slack and his eyes rolling back into his head. His mind was reeling from the brief contact. The pain radiated through every nerve in his body, but what he felt went far beyond any mere physical sensation. It was not the raw heat of the dark side but rather the empty chill of the void itself spreading through him. It touched every synapse in his mind, it clawed at the core of his spirit. In that instant he tasted utter annihilation, and felt the true horror of absolute nothingness.

...

The tendrils were massing for another assault, moving faster as Zannah fed them with a steady stream of power. Bane unleashed violet lighting from his fingers, but when the bolts struck the sinewy black forms they were absorbed with no apparent effect. They were made of pure dark side energy, and there was no way he could harm them.

...

With his foe unarmed and helpless at his feet Bane brought his arm down for the coup de grace, only to have it intercepted midswing by one of the dark side tendrils. It wrapped itself around the elbow. Skin, muscle, sinew, and bone dissolved instantaneously, severing the limb.

Source: Dynasty of Evil

Sith Sorcery

From Freedon Naad's Holocron and through Darth Bane, Zannah learned about and how to perform Sith sorcery:

"A rare few have a natural affinity for the dark side itself. They can delve into the depths of the Force and summon arcane energies to twist and warp the world around them. They can invoke the ancient rituals of the Sith; they can conjure power and and unleash terrible spells and dark magics."

"Is that my gift?" Zannah asked, barely able to contain her excitement. "Am I a Sith sorcerer?"

"You have the potential," Bane told her. From inside his robes he produced a thin leather-bound manuscript. "Hidden deep inside the Holocron, I discovered a list of powerful spells. I transcribed them into this tome. They will help you focus and channel your power for maximum effect . . . but only if you study them carefully."

Source: Rule of Two

A description of her sorcery powers:

Sith sorcery was as much a part of the dark side as the deadly violet bolts of energy her Master unleashed from his hands, and when Bane had first recognized her talent for the subtle but devastating magics he had encouraged her studies in the arcane. From the ancient texts she had learned to twist and torment the thoughts of her enemies. She could make them see nightmares as reality; she could cause their deepest fears to manifest as demons of the psyche. She could, and had, rip the minds of her enemies apart with a simple thought and a gesture.

Source: Dynasty of Evil

She has learned other forms of sorcery on top of the spells Bane had given her:

Zannah could do things with the Force that Bane couldn't even attempt. She could attack the minds of her opponents, turning their own thoughts and dreams against them.

During her apprenticeship, Bane had encouraged her in her studies of the magical arts. He had given her ancient texts filled with arcane rituals, urging her to expand her knowledge and push the boundaries of her talent. He had directed her training so that she could achieve her full potential. But he did not realize just how far she had come.

In addition to the tomes her Master had provided, Zannah had sought out her own sources of hidden Sith knowledge over the years. Practicing in secret, she had progressed far beyond Bane's expectations, learning new spells to unleash the dark side in ways he had never even imagined.

Source: Dynasty of Evil

Zannah looks into the mind of Cyndra and makes her see her worst fears. Cyndra would eventually end up in a catatonic state:

Zannah shook her elbow free of Cyndra's grasp and raised her shackled hands before her face. Weaving her fingers in a complex pattern in the air, she reached out with the Force and plunged deep inside the Chiss woman's mind to find her secret, most primal fears. Buried in her subconscious were nameless horrors: abominations and creatures of nightmare never meant to see the light of day. Drawing on the power of Sith Sorcery, Zannah plucked them out and brought them to life one by one.

The entire process took less than a second. In that time Cyndra had drawn her weapon, but instead of pointing it at Zannah she suddenly screamed and aimed it high in the air above her, firing wildly at demons conjured from her own mind that only she could see.

The illusions grew more real and more terrifying the longer the spell continued, but Zannah had no intention of ending it yet. The Chiss shrieked and threw her weapon to the ground. She flung her head wildly from side to side, covering it with her arms and screaming "No!" over and over before collapsing on the floor. Weeping and sobbing, she curled up into a tight little ball, still muttering "No, no, no . . ."

...

Zannah could have ended it then, dispelling the illusion and allowing Cyndra to fall into unconsciousness. She would wake hours later with only the most basic recollection of what had happened, her mind instinctively recoiling from the memories of what it had witnessed. Or Zannah could push the illusion even farther, driving her victim to the edge of insanity and beyond. An image of the Chiss romantically entangled with Kel sprang unbidden into her mind----and Zannah pushed.

Cyndra's cries of terror became animals howls as her sanity was ripped apart by the ghastly visions. Her hands scratched and clawed at her own eyes, tearing them out. Blood poured down her cheeks, but even blindness couldn't save her from the nightmares crawling through what was left of her mind.

Her howls stopped as her body went into seizure; her mouth foamed as her limbs convulsed wildly on the floor. Then, with a final bloodcurdling shriek, she fell suddenly limp and lay still. Her conscious mind completely and irrevocably obliterated, her catatonic body was now nothing more than an empty shell.

The body shivered once, and Zannah knew that somewhere in the deepest core of Cyndra's subconscious a small part of her still existed, silently screaming, trapped forever with the horrors inside her own mind.

Source: Rule of Two

Zannah uses her sorcery against the Dark Jedi Set Harth. This spell would leave weak minded beings in a forever comatose state, and even if you had the strength of mind to beat it, you would still be incapacitated for about a day:

As he drew near, she responded not with physical violence, but rather a powerful spell of Sith sorcery that attacked Set's mind. He tried to throw up a protective Force barrier in response, but Zannah's power shredded his defenses, leaving him completely vulnerable.

...

With Set, however, she did not intend to destroy him completely. Instead she enveloped him in a cloud of utter despair and hopelessness. She reached into the innermost recesses of his mind and wrapped it in the nothingness of the void.

Set's eyes went blank, his jaw hung slack, and his lightsaber slipped from nerveless fingers. He slowly slumped to the ground, his eyes closing and his body trembling slightly as he curled up into a fetal position.

This was to be his final test. A weak mind would collapse upon itself to wither and die, leaving the victim forever comatose. If Set was strong, however, his will would fight back against the horror. Little by little it would tear away at the emptiness, refusing to die, clawing its way back to the surface until consciousness finally returned.

If Set was truly worthy of being her apprentice, he would recover from his current condition in a day or two.

Source: Dynasty of Evil

She uses her sorcery against Sarro Xaj, which distracts him enough for her to cut him down:

The big man hesitated, casting a quick glance over toward the others to see what had happened. Seizing the opportunity, Zannah's fingers flickered in strange patterns as she unleashed her Sith sorcery at her foe.

His eyes went wide and he stumbled away from her, his lightsaber swinging wildly at the air around him as he was beset on all sides by imaginary demons. Flailing in half-mad terror at the invisible monsters, he ignored Zannah as she swooped in and ended his life with one long, diagonal stroke across his muscular chest.

Source: Rule of Two

She uses her sorcery on her cousin Darovit, causing him to go crazy and attack the group of Jedi who came to Ambria:

An unwanted vision of the pitiful creature she had turned Darovit into flashed through her mind. She remembered him huddled in the corner, quivering in terror. He clutched the handle of a lightsaber against his chest, his only defense against the horrors and nightmares he saw crawling toward him from every corner.

Source: Rule of Two

Concealment Spell

Zannah goes on a mission to the Jedi Archives on Coruscant, and the whole time there, she had to use a complicated spell that would hide her dark side energy and project and aura of light side energy at the same time:

Throughout her mission, she would be surrounded by servants of the light; if they sensed the dark side in her, she would be instantly exposed. The secrecy she and Bane had worked so hard to preserve would be destroyed. Everything they had labored for over the past decade, everything they had accomplished, would be for naught. She would surely be captured, possibly condemned to death, and her Master would be hunted down and slain.

The only way the plan would work was if she could use the power of Sith sorcery to mask her strength while simultaneously projecting an aura of light-side energy. It was a complicated spell, one she had never tried before. It required a balance of strength and delicacy, and she had practiced it continuously in the weeks leading up to her departure.

Source: Rule of Two

She conceals herself in the Force so that none of the Jedi attacking Bane could sense her:

Gathering the dark side around her, Zannah created a concealing cloak to mask her power as she had done at the Jedi Temple.

...

Zannah rushed to her Master's aid, coming up silently behind the Jedi. Her presence hidden by her spell of concealment, they never sensed her coming. She struck the Echani down first, thrusting her blade forward so that it pierced the Jedi's back and ran through her.

Source: Rule of Two

Zannah hides herself and Bane from a group of 14 Jedi who came to Ambria to look for them, even hiding themselves from a Jedi Master who was right on top of them:

He never thought to examine the small sleeping mat in the corner. He never noticed the trapdoor built into the floor beneath it. And he never sensed the apprentice and her unconscious Master, masked by Sith sorcery, hiding silently in the cellar just below his feet.

Source: Rule of Two

The same spell would be felt ten years later by Darth Cognus:

She had heard of this happening to others, but she'd never experienced it herself. It wasn't the images of Caleb's gruesome death that had caused her to recoil. It had been sorcery, Sith magic. A spell of concealment had hidden the Sith Lord and the young woman from the Jedi who had discovered the healer's body. The memories still carried the echo of the spell upon them; even after a decade it had been potent enough to momentarily overwhelm her.

. . .

The lingering remnants of the Sith spell had been enough to thwart her efforts to peer into the past.

Source: Dynasty of Evil

Intelligence/Cunning

Zannah is able to grasp bits of information and put them together:

Zannah had always been able to grasp bits of information and put them together into something meaningful.

Source: Dynasty of Evil

Zannah, even as a child, was powerful, cunning, and intelligent:

She had shown not only her power, but also her intelligence and cunning.

Source: Rule of Two

Zannah had spent a few years gathering info on all of Darth Bane's contacts, should she have need of them after she took over the mantle of Sith Lord:

Zannah had never met Argel, but she knew who he was and what he did. Over the past few years she had slowly been gathering information on all the members in Darth Bane's network of contacts; they could prove useful to her once she took over the Sith.

Source: Dynasty of Evil

Zannah regularly uses her charm and looks to swoon men, and knows how to bribe her way with officials so that she can do anything without attracting unwanted attention:

She made a point of being friendly with everyone at the spaceport. She saw it as an investment in the future----the cultivation of a potential resource. The members of the Senate and other powerful individuals might shape galactic policy, but it was the bureaucrats, government officials, and various other low-level political functionaries who actually made things run . . . and they were so much easier to deal with than the political elite. A few kind words and a handful of small bribes, and Zannah could get anything she needed without attracting unwanted attention. Just as she had done with Chet.

This was one advantage she had over Bane. She knew she was attractive. Men in particular were drawn to her because of her looks; they wanted to help her, to please her. Zannah wasn't above encouraging them with a soft laugh or a subtle touch----it was a small price to pay to establish a relationship that might eventually prove useful.

Source: Dynasty of Evil

She knows how to read people, feigning sympathy for a Rodian so that he wouldn't be scared while talking to her:

She knew how to read people. The Rodian was like an abused pup, cowering as he waited for the next blow. Show him a little compassion, however, and he would react as if she had saved his life.

Source: Dynasty of Evil

She analyzes Set Harth's fighting style within the first few moments of their fight:

In only the first few moments of the battle she had already evaluated her opponent, noting his speed, agility, and technique.

Source: Dynasty of Evil

Zannah knows the name of every Master in the Jedi Order:

Ever since her battle against the Jedi on Tython, Bane had insisted they both know the name and reputation of every Master in the Order.

Source: Dynasty of Evil

Speed

Zannah fends off Darth Bane, who attacked her with a speed and ferocity she had never seen before and while he created a dozen afterimages of his blade:

But this was no drill, and her Master came at her with a speed and ferocity she had never faced before. Giving in to his orbalisk-fueled bloodrage, he was like a wild animal, raining savage blows down on her from all angles, the strikes coming so fast it seemed as if he wielded a dozen blades at the same time. Zannah fell into a full retreat, desperately giving ground beneath the overwhelming assault.

Source: Rule of Two

Zannah kills two men before they can form an expression on their faces:

Zannah answered by whipping out her lightsaber handle and igniting the red three-quarter-length blades protruding from each end. She moved with the blinding speed of the Force, her first vicious slash severing Pommat's outstretched arm at the elbow and carving a lethal furrow across his chest while the second cleanly removed Quanno's head from his body. Both were dead before they even had a chance to register an expression of surprise.

Source: Dynasty of Evil

She dodges a lightsaber throw by Set Harth, which was described as faster than thought itself:

The attack came the instant Zannah opened her mouth to reply. It came without any warning, Set moving with the preternatural speed of the Force. The Dark Jedi's lightsaber materialized in his hand, igniting and spiraling across the room toward her faster than thought itself.

Zannah barely managed to duck out of the way, the lightsaber's blade slicing off a section of her cape as she threw herself to the floor.

Source: Dynasty of Evil

Zannah catches Darth Bane's lightning on her lightsaber:

Just before she had him pinned, however, a bolt of violet lightning shot forth from his palm. The woman countered by catching the bolt with one of her lightsaber blades. It absorbed the energy, emitting the strange, high-pitched hum Serra had heard earlier.

Source: Dynasty of Evil

While watching Zannah and Bane's duel, Darth Cognus could barely keep up with their movements:

The conflict had been brief but intense: she had marveled at the speed of their blades, their movements so fast she could barely follow the action.

Source: Dynasty of Evil

Lightsaber and Fighting Skill

Zannah uses a double-bladed lightsaber in combat:

The handle of Zannah's lightsaber was slightly longer than normal to accommodate the twins crystals required to power the blades that extended from either end. However, while most traditional double-bladed weapons had blades each measuring a meter and a half or more, those of Zannah's lightsaber were slightly under a meter in length.

Source: Rule of Two

The shorter blades of her lightsaber grants her better speed and maneuverability, as well as allow her to create an impenetrable defense:

"The smaller blades give you greater speed and maneuverability," her Master explained as the fourteen-year-old Zannah twirled her newly constructed lightsaber in her left hand, focusing on mastering the feel of its unique balance and weight.

"Grip the handle lightly in your fingers. Control the weapon with your wrist and hand rather than the muscles of your arm. You will sacrifice reach and leverage, but you will be able to create a shield of impenetrable defense."

Source: Rule of Two

Zannah has been taught Form III, Soresu, becoming an expert in it:

"You lack the physical strength required for the powerful attacking strikes of Djem So or the other aggressive forms," her Master exclaimed. "You must rely on quickness, cunning, and, most of all, patience to best your enemies."

. . .

"Form three allows you to parry incoming attacks with minimal effort," he told her. "Your opponent must expend precious energy with each blow, slowly tiring while you remain fresh and strong."

Source: Rule of Two

At Bane's urging, she had become an expert in the defensive sequences of the Soresu form.

Source: Dynasty of Evil

Gallery

With her lightsaber, Zannah uses red synthetic crystals:

Zannah fends off Darth Bane's frantic attack against her. Bane had his Orbalisks on at the time, which amped his physicals and his strength in the Force, and attacked her with a furry she had never seen before, yet she was able to hold him off:

When it was over her Master turned to face her. She waited for him to demand an explanation, but instead he let loose with a cry and flew at her. Zannah barely had time to ignite her twin blades to meet his completely unexpected attack.

She fell into a defensive posture as she so often had during their training sessions. But this was no drill, and her Master came at her with a speed and ferocity she had never faced before. Giving in to his orbalisk-fueled bloodrage, he was like a wild animal, raining savage blows down on her from all angles, the strikes coming so fast it seemed as if he wielded a dozen blades at the same time. Zannah fell into a full retreat, desperately giving ground beneath the overwhelming assault.

"I did not betray you, Master!" she shouted, trying to make Bane see reason before he cleaved her in two. "I lured Hetton here so you could kill him!"

She ducked under a horizontal cut from his lightsaber, only to catch a heavy boot in her ribs. She rolled with the kick, narrowly avoiding the return cut of his blade. She parried a sharp descending blow, gathered her feet, and launched herself backward, flipping ten meters clear.

Source: Rule of Two

Zannah holds the edge over Set Harth, a Dark Jedi:

As he leapt over the couch toward her, Zannah ignited her own weapon. The twin blades sprung to life, and she fell into the familiar dance.

Set came in low to start, slashing at her legs. When she parried his incoming blade he spun away quickly, moving out of range before she could retaliate. With the Force he picked up a bronze bust on the side of the room and hurled it toward her left flank. At the same time, he dived forward into a somersault that brought him close enough to strike at her right side as he tumbled past her.

Zannah easily repelled both threats, her spinning blades slicing the bust in half even as she pivoted just enough so that Set's weapon missed her hip by less than a centimeter. For good measure she kicked him hard in the back as he rolled past, a blow meant not to disable him, but to goad him on to further aggression.

When two skilled combatants each other with the lightsaber, the blades moves so quickly it was impossible to think and react to each move. Bane had taught her to rely on instinct, guided by the Force and honed by thousands of hours' training in the martial forms. This training allowed her to realize within the first few passes that Set was using a modified variation of Ataru, a style defined by quick, aggressive strikes. In only the first few moments of the battle she had already evaluated her opponent, noting his speed, agility, and technique. Set was good. Very good. But Zannah also knew without any doubt that she was much, much better.

Set, however, had yet to come to the same realization. Her kick had had the desired effect: when he came at her the next time his face was twisted with snarling rage. His fury allowed him to call upon the dark side, making him even more dangerous as he unleashed his next series of attacks. Leaping high into the air, crouching low to the ground, lunging forward, springing back, spinning, twisting, and twirling, he came at her from every conceivable angle in a relentless barrage meant to overwhelm her defenses, only to have Zannah turn his efforts back with a cool, almost casual, efficiency.

Lightsaber battles were brutal in their intensity; few duels lasted longer more than a minute. Even for a trained Jedi, the effort of all-out combat was exhausting . . . particularly when using the acrobatic maneuvers of Ataru. It didn't take long for Zannah to sense that her opponent was wearing down. She, on the other hand, was barely winded. At Bane's urging, she had become an expert in the defensive sequences of the Soresu form. It was simple for her to parry, redirect or evade her opponent's blows by using Set's own momentum against him, easily keeping the Dark Jedi at bay.

In their short encounter, she was presented with at least a dozen opportunities to land a lethal blow to the silver-haired man. But she hadn't come here to kill him; not yet, at least. She had come here to test him, to see if he was worthy of being her apprentice.

. . .

She was toying with him now, dragging the battle out. It wasn't enough for her to want Set as an apprentice; he also had to want her to be his Master. She had to prove her superiority so completely that he would be willing to serve. It wasn't enough just to beat the Dark Jedi; she had to break him.

When he was a step slow in retreating after one of his thrusts, she kicked his feet out from under him and sent him sprawling to the floor, only to back away and let him get to his feet again. When he moved back in, she twisted her lightsaber in a sharp, unorthodox move, hooking one of her blades onto his and wrenching the weapon from his hand.

Set sprang back immediately and used the Force to yank the hilt back to his palm, then stubbornly renewed his attacks. But as the second slipped by, the fire of the dark side was less and less able to fight off the fatigue setting into his joints and limbs.

It was inevitable that his weary body would betray him, and soon enough he came in with his blade held too far to the side, instead of tight in front of him. Zannah stepped forward and snapped her foot straight up, catching Set under the chin. He staggered back howling in pain while a string of unintelligible profanities spewed from his mouth, along with a spatter of blood.

"Do you yield?" Zannah asked.

Source: Dynasty of Evil

She duels Darth Bane and holds her own, despite him using a form she had never seen before:

Zannah expected Bane to come at her aggressively, but even so she was caught off guard by the ferociousness of his attack.

He opened with a series of two-handed overhead chops, using his great height to bring his blade hacking down at her from above. She easily blocked each blow, but the momentum of the crushing impact caused her to stagger back, throwing her off balance.

She recovered quickly, however, spinning out of the way when he followed up with a low, looping swing meant to hew her off at the knees. She retaliated with a quick jab with the tip of one of her blades toward Bane's face, but he ducked his head to the side and came back with a wide-arcing, single-handed slash at chest level.

Zannah intercepted his blade with one of her own, angling her weapon so that the momentum of Bane's attack was redirected downward, sending the tip of his lightsaber into the dirt. This should have exposed him to a counterthrust, but he was already reacting to her move, driving his entire body forward into Zannah's before she could bring her weapon up.

His weight slammed into her, knocking her back as Bane snapped his neck forward. Zannah threw her head back just in time, and the head-butt that would have smashed her face glanced off her chin instead.

Scrambling to stay on her feet, Zannah raised her weapon back up, spinning the handle so that the twirling blades formed a defensive wall that repelled Bane's next half a dozen blows.

During her years under Bane, they had sparred hundreds of times. During these sessions she had always known he was keeping something in reserve for the day they would inevitably fight for real. Only now did she realize just how much he had been holding back.

He was faster than she could ever have imagined, and he was using new sequences and unfamiliar moves he had never revealed during their practice sessions. But somehow she had survived the initial flurry, and now she knew what to expect.

The next exchange had a more familiar feel. Bane pressed the action with a devastating, complex combination of attacks, but Zannah was able to intercept, parry, or deflect each one. Her defensive style was simple, but performed correctly it was nearly impenetrable.

Recognizing this, Bane backed off and changed tactics. Instead of a savage, relentless pressure meant to overwhelm her, he settled into a pattern of feints and quick thrusts, probing and prodding her defenses in search of a weakness as the two of them settled in for a long battle of attrition.

Zannah had fought him once before, back when he was still encased in his orbalisk armor. She remembered it had been like battling a force of nature: the chitinous parasites covering his entire body had been impervious to lightsaber attacks, allowing him to attack with pure animal rage. She had survived that encounter only by convincing Bane she hadn't betrayed him, and in the end he had let her live.

His style back then had been brutish and simple, though undeniable effective. Now, however, his technique was more advanced. Unable to simple bully his way heedlessly forward, he had developed an unpredictable, seemingly random style. Each time she thought she could anticipate where the next attack was coming from, he changed tactics, disrupting the rhythm of the battle and causing her to give ground.

She was being driven back now in a slow retreat, and she realized he was herding her toward the shuttles, hoping to pin her against the metal hull with no place to go. Zannah was content to play along, taking quick, careful steps backward over the soft, sandy terrain as she began to gather her power.

The key was subtlety. She couldn't let Bane sense what she was doing or he would launch into another wild flurry of attacks, forcing her to focus all her energy on keeping him at bay. She had to give him the illusion he was controlling the action, when in fact she was only a few seconds away from unleashing a burst of dark side sorcery that would rip his mind apart.

Bane circled wide trying to come in on her left flank. Zannah simply altered the angle of her retreat, taking several more steps backward to keep him at a safe distance as she swatted away a few token slashed and strikes.

With her attention split between the enemy in front of her and the Sith spell she was preparing to cast Zannah didn't notice how close she was to the freshly dug graves. Her heel caught on the uneven ground as she backed up, throwing her off balance as she fell awkwardly to the ground and landed on her back.

Bane was on her in an instant, his lightsaber slashing viciously, his heavy boots kicking and stomping at her prone body. Zannah thrashed and twisted on the ground, her lightsaber flailing desperately to parry Bane's blade. She felt a sharp crack as the toe of his boot caught her in the ribs, but she rolled with the impact and managed to end up back on her feet.

Her vision was blurred with stars, pain shooting through her left side with each gasp as she tried to catch her breath. Bane didn't let up, coming at her with a frenetic assault. The next few seconds were a blur as Zannah relied purely on instincts honed over twenty years to parry the wave of blows, miraculously keeping him from landing a lethal strike.

Zannah threw herself into a back handspring, flipping head over heels three times in quick succession just to put some space between her and Bane. Before the fourth one she suddenly stopped and went into a crouch, thrusting forward with her lightsaber like a spear to impale her opponent as he charged after her in pursuit . . . only Bane wasn't there.

Anticipating her move, he had stopped several meters away.

Gritting her teeth against the pain from her broken rib, Zannah rose to her feet. Bane hand't killer her, but her survival had come with significant cost. She was tired now, the desperate scramble to escape after tripping on the grave had pushed her one step closer to physical exhaustion. She felt the broken rib with each ragged breath, and she sensed that the injury would make it harder for her to pivot and turn, limiting the effectiveness of her defensive maneuvers.

She couldn't wait any longer. She'd wanted to surprise Bane, slowly gathering her strength before unleashing it so he wouldn't be able to properly defend against it. But she knew she wouldn't survive another clash of lightsabers.

Opening herself up to the power of the dark side, Zannah reached out and touched the mind of her Master.

Source: Dynasty of Evil

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