Brother of Malfurion Stormrage; Illidan became a transformed Demon Hunter after consuming the powers of the skull of Gul’dan. Illidan was defeated by Arthas while attempting to kill the Lich King in Northrend; although assumed dead, he was not actually slain. Twisted by his lust for arcane magic, he now commands a great army of Naga, Blood Elves, and Draenei from his encampment in Outland. He has also closed off all the local portals in an effort to protect himself from both the armies of Azeroth and the wrath of the Burning Legion (the latter of which he incurred after swearing himself to Kil’jaeden the Deceiver and then failing him in the line of duty). In spite of his efforts, Illidan was nonetheless hunted down by Kil’jaeden, who ultimately chose to give him a chance to redeem himself by killing the Lich King.

During the time of the War of the Ancients, Illidan’s lust for magical power and jealousy of his twin brother’s lover caused him to betray his Night Elf allies and befriend the Burning Legion. After the Night Elf victory, he was sentenced to an imprisonment that lasted 10,000 years, eventually being freed in Warcraft III: Reign of Chaos by Tyrande Whisperwind.

In World of Warcraft: The Burning Crusade, Illidan is the final raid boss in Outland, residing in the Black Temple in the Shadowmoon Valley. He is currently the most powerful boss in World of Warcraft.

Appears in Warcraft: War of the Ancients trilogy
Appears in Warcraft III: Reign of Chaos
Appears in Warcraft III: The Frozen Throne
Appears in World of Warcraft: The Burning Crusade