Doombringer Xai'kahal

"You face the might of the Burning Legion!"

Doombringer Xai'kahal is a doomguard loyal to the Hellwrath Vanguard.

The World of Xandros
Little is known about Xai'kahal's exploits except that he is a fierce follower of Mongrethod, the ruler of the legion-conquered world of Xandros, when Mongrethod was summoned by Gul'dan and eventually defeated..Xai'kahal sought a new master in the Twisting Nether.

Hellwrath Vanguard
Xai'kahal's search was over when he was impressed by the vanguard's warriors and their might, he offered his services to the vanguard in exchange for housing him inside Hellwrath Fortress.