Two new playable races were added to World of Warcraft in The Burning Crusade: The Draenei of the Alliance and the Blood Elves of the Horde. Previously, the Paladin class was exclusive to the Alliance faction, and the Shaman class was exclusive to the Horde faction; these new races allowed Alliance players to play Shaman as Draenei, and allowed Horde players to play Paladins as Blood Elves.