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.
In Vol 3 of He-Man and the Masters of the Universe, Hordak sends Despara to Eternia so she could undo King Greyskull's legacy by making Eternia into a new Etheria, one which Hordak can rule. Despara and the Horde end up ruling Eternia and making He-Man and the Masters of the Universe into rebels on the run for their lives. Despara finds out she is Adam's (He-Man) sister, Adora from Shadow Weaver. Hordak finds out Adora knows the truth and kills Shadow Weaver. When Adora helps her old friend Teela, that she captured while she was Despara, Hordak appears to them in spirit form on Eternia. He tells Adora that he no longer needs her and that she ruined her ancestor, King Greyskulls legacy by helping him take over Eternia. His plan was to have Skeletor kidnap the twins Adam and Adora as kids so he could use them to his evil agenda to ruin Greyskull's legacy as revenge. He-Man and some of the Masters come to Adora's aid and Hordak tells He-Man that Eternia is his and that he destroys Castle Greyskull with but a thought of his mind, and while Hordak was in another dimension, Etheria. Hordak then vanishes as he tells his Horde to kill them all. Back in Etheria, Hordak is troubled by Despara remembering who she is and turning back into Adora, and he is confused why he is concerned because she was just a pawn of his that he used to take over Eternia.
Vol 4 of He-Man and the Masters of the Universe, "What lies within" Hordak has full control over Eternia and has Grizzlor use a weapon to kill many of the Masters.
Vol 5 of He-Man and the Masters of the Universe, "Blood of Greyskull" In a flash back it shows Hordak fighting King Greyskull to rule Eternia, but King Greyskull ends up killing Hordak and sending his armies to the dimension of Despondo's. In Despondo's Hordak's physical body dies but his hate and will power allows him to become one with Despondo's, he becomes a spirit form and feeds on different worlds in Despondo's especially the world known as Etheria. He feeds on the souls of its people and their will power. He creates a Fright Zone in every world he rules. Back on Eterina, Hordak is now slowly draining the souls of its people and feeding on their fear but due to him being banished he can not leave Despondo's but he can still feed on Eternia, also, reality warping Eternia into his own image. He has Triclops track down He-Man and Adora because he needs to blood of He-Man to be finally free of Despondo's and so he can become a physical being again. Triclops finds Adora and He-Man, but in a strange twist Adora becomes possessed and she slits He-Man's throat and gives the blood to Triclops and tells him to tell Hordak she is once again Despara, but a little later she comes to her senses and asks the Sorceress (now Teela) to help her heal her brother, so the Sorceress tells Adora she must find the Sword of Protection in order to save her brothers life. Adora defeats the witch that has the sword and turns into She-Ra and saves He-Man. Meanwhile, Triclops gives Hordaks He-Man's blood and Hordak says he can now finally leave Despondo's.
Hordak will be one of the main characters in "The Eternity War"
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.