Warcraft Lore 8: Illidan Returns with Naga

Months after the destruction of the Burning Legion and The Scouge at Mount Hyjal, another demon Overlord Kil'Jaeden recruits Illidan to destroy the weakened Lich King in the Frozen Throne, promising great power in return.

Illidan had obtained (tricked by Arthas) the skull of Gul'dan which transformed him into a black demon being. He plans to destroy the master of The Scourge no matter the cost to his soul.

However, because of his new form, he is labeled as a traitor and a renegade by his own brother and people thus banished from the forests. He then recruits the help of Lady Vash and the Naga race from under the sea, who were of the same race as Illidan 10,000 years before but were mutated after the original Well of Eternity was blown apart and the continents torn assunder.

With these fearless warriors Illidan means to right his past wrongs by destroying the Scourge. But power corrupts...