Kil'jaeden the Deceiver is a powerful eredar demon lord and is the acting leader of the Burning Legion. Selected twenty-five thousand years ago as the chief lieutenant of Sargeras, he was ranked above the now-deceased demon lord, Archimonde. While Archimonde had led the Legion's armies, Kil'jaeden's agenda was to assimilate every race possible into the folds of the Burning Legion. Since the apparent banishment of Sargeras, he has assumed the role of supreme commander. He is also notable as the creator of the Lich King. Although Kil'jaeden was infuriated at the failure and death of Archimonde, he knew better than to take reckless vengeance. Aware that the Lich King had grown out of his control, he then went about to acquire a new pawn. He found Illidan, and told him that, despite his part in the Legion's downfall, The Deceiver was willing to offer him a chance at power. However, Illidan failed and the Lich King persists, having cheated The Deceiver by merging with Arthas. For now, Kil'jaeden's vengeance is embodied in the mighty fel reaver Doomwalker, who lays siege to the gates of the Black Temple.Players face off against this twisted avatar of Kil'jaeden, which is still being summoned into Azeroth through the Sunwell itself by his new lieutenant, Kael'thas Sunstrider. Anveena, the embodiment of the Sunwell's energies, is held in an arcane barrier, her powers being drained to feed the portal.