Magtheridon ' s Forces Magtheridon ' s Forces ( also called Magtheridon ' s forces or Magtheridon ' s army ) are a part of the Burning Legion under the command of the pit lord Magtheridon . History . After Draenor ' s destruction , the Burning Legion took advantage of the oppening of portals and took control of Outland , they established the mighty pit lord Magtheridon as its ruler . For years the Legion used Outland as a planar way station from which they could stage attacks on other worlds . They do these for various years , where they hunted down the remaining draenei , enslaving some of them and rallied the surviving orc s turning them into fel orc s . Magtheridon ' s Forces grew stong over the years thanks to the Dimensional Gateway s created by Ner ' zhul , from which he summoned demons to mantain his brooding fortress . Meanwhile , Illidan Stormrage tried to destroy the Frozen Throne as Kil ' jaeden had commanded him but failed , for his unsuccesful mission he fled to Outland into exile fearing for his masters wrath . His allies Kael ' thas and Vashj followed him , at their reunion Illidan told them that they should ensure that Kil ' jaeden ' s agents have been cleansed from Outland . Illidan ' s first action against Magtheridon ' s Forces was to seal the Dimensional Gateways , his forces covered him in the process . The blood elves and naga aided by a group of draenei leaded by Akama , who pledged his alligance to Illidan if he helped him to defeat the pit lord , mantained the battle against the Fel Horde while Illidan closed the portals , aided by Kael , Vashj and Akama . When they were all closed Magtheridon ' s Forces where measurable as no reinforcements could arrive . Magtheridon was informed of Illidan ' s forces approach but was too confident that he would not be defeated and were just weaklings . The Black Citadel was fortified by four orc encampments and many patrolling demons , besides towers that killed anyone who attempted to cross the doors . The draenei infiltrated and desactivated the doors from behind , then Kael and Illidan attacked for the front . Meanwhile , Vashj attacked by the aqueducts , destroying hydra s and orcish ships . Illidan and Kael killed the Butcher and Rend , while Vashj killed Sagra ' nel , then the two armies joined by a bridge and helped each other to kill Maim , Nera ' thor , Master of Pain and Mistress of Torment . The inner chambers oppened , the draenai desactivated the last towers and Illidan ' s forces attacked to Magtheridon and his lackeys . After a battle the pit lord was defeated , who couldn ' t believe his defeat , his defeat was mainly caused because he became complacent as he hadn ' t have a real enemy in many years and was taken by surprise by Illidan . After the defeat of Magtheridon ' s Forces , Illidan merged them into his own forces . Stationing the Fel Horde in Hellfire Peninsula , putting Kargath Bladefist as the warchief and taking many of the demons to form the Illidari . Many thought that Maghteridon was killed but he was just beaten and bloodied and taken to Hellfire Peninsula , where Illidan ' s most powerful warlock allies put him in magical and physical chains , there his was put to produce more Fel Orc s who can reinforce Illidan ' s forces even further .