Hec-Tor Kur being the second born to rule the Horde Empire, and in command of the armies of the horde, set out to impose the will of the empire to all of the universe. his biggest rival was the magical agent of good, He-ro. He followed the Cosmic Enforcer to the planet Eternia. With much magic on the planet made Eternia a ripe jewel of the universe to be taken.
He later raised an army to fight King Hisss and his snakemen; though he defeated the snakemen he lost to King Greyskull and the free people of Eternia. Having a spell back fire upon himself and his army sending him to the prison dimension of Dispondos. It would be there that Hordak would conquer one of the planets with in the dimension called Etheria which would become his base of operations.
Years later he would contact a young alchemist back on Eternia named Keldor. He taught the young one the powers of the dark arts in exchange for his help to escape. Though betrayed by his pupil he still sets his sights on conquering all the known universe.
Now ruler of the planet Etheria he fights an ongoing battle against a group of rebels who call themselves the Great Rebellion. they hid amung the Whispering Woods, an enchanted forest that hides the rebellion and prevents dark magic from working within its confines. His new enemy is She-ra who has some relation to He-man of the planet Eternia. Though times things often turn into a stale mate. Hordak loses little more land to the rebels.
Not often settling for just the universe itself. Hordak keeps coming back to Eternia being his one failure to conquer. Often finding breaches in the dimensional rift he tries what he can to conquer Eternia and gain a foot hold on the planet. Most often fighting on two fronts from his former pupil now self proclaimed overlord of evil Skeletor, and the Champion of Eternia, He-Man.
With the expanse of his Horde Empire, Hordak employs the help of evil creatures from across the universe, or corrupting others to do his bidding. former Etherian apprentice now top dark magic user Shadowweaver, Prison Master Grizzlor, Force Captain Catra, Scorpia, Multi-bot, and many others.
Often to enforce fear into the masses each planet has created a Fright Zone where prisoners are sent to be tortured, one of the most notable tortures concocted by Hordak was the Slime Pit. his previous attempt to make a Fright Zone on Eternia back fired due to the strong magical force on the planet. Nearly tearing the planet apart he ended up stopping the spell and created the dark hemisphere on Eternia.
The New DC
Origin of Hordak
For more information see Masters of the Universe: The Origin of Hordak
On Horde World, one million years before the birth of Adam, Zodac, Cosmic Enforcer: 097-427-09 has brought his army to defeat the horde and the "Beast" Hordak. His army was able to kill all the Horde but Hordak's presence still lived and Zodac's army was destroyed. Hordak taunts Zodac to the castle, where Hordak releases monsters on the hero. After the hero defeats the monsters Hordak still beckons the hero close and when Zodac asks why Hordak still laughed, the villain reveals that all the dead soldier now gave him great power. Hordak and Zodac battled, and Hordak is able to add Zodak's power to his own becoming the Master of the Universe.
Hordak is a master of the dark arts, though severely weakened against his fight with King Grayskull and having his body shattered. He now uses a custom mechanical body made for him while in dispondos dimension. He gains the ability to shape change his mechanical body into weapons or forms of transportation, eg; a rocket.
His dark powers seem to focus on destruction or changing his own well being. Though in his old body, his powers seem to range into mass mind control. His power is also fueled by the fear he inspires from his own men and the populations he enslaves. Those who question or disobey him are almost immediately destroyed or tortured for more information.