The final Boss was of course, Illidan himself.
Illidan Stormrage, otherwise known as the 'Traitor', was now the leader of the Outlands and the final Boss of the Black Temple. He was once a Night Elf and was Malfurion Stormrage's younger brother who had been romantically involved with Tyrande Whisperwind.
Illidan was born with an innate talent and passion for Magic.
After being freed from imprisonment, he began a rampage of outrageous doings, such as absorbing Gul'dan's power, awaking the Naga and swearing loyalty to Kil'jaeden. The Illidan now was no longer a demon or a Dark Elf. He was no longer what they knew as a living being. He was now being hunted by Maiev Shadowsong.
Illidan's life was filled with legends and constant drama. Perhaps it would be wiped clean one day, but not right now. He was a complete traitor.
