|The Burning Crusade
Since then, the Night Elves have not trusted their pale-skinned brethren. Allied with the Humans for many years, the High Elves provided archers and priests, and even taught the Humans how to use magic. In the third war, however, a bigoted general alarmed by their renaming themselves as Blood Elves in memory of their fallen brethren, sent the elves on suicide missions, only to be rescued each time by Illidan's nagas.
Led by Prince Kael'thas, their last surviving royalty, the Blood Elves swore their allegiance to Illidan and many followed him into Outland. The group that remains in Azeroth has been cut off and has sought alliance with the Forsaken to reclaim their homelands and find new sources of magic to replace their lost Sunwell. Mostly untrusted by the other members of the Horde for their unscrupulous motives, the Blood Elves have captured a Naaru and are leeching the powers of the light from it to create their own sect of paladins. As such, Thrall has reluctantly agreed to work alongside them.