Kael'thas' forces (also referred as Kael'thas' army) is the term referring to the armies under Kael'thas Sunstrider after he departed from Azeroth and joined Illidan's forces. The army consists mostly of blood elves but also includes some fel orcs and demons among the ranks. Although Kael'thas is supposedly allied with Illidan Stormrage, in truth he has joined the Burning Legion (the enemies of Illidan) because of his hunger for magic.