Mantorok is one of the four Ancients in Eternal Darkness. He is the God of Chaos, and is not bound in the Circle of Power, unlike the other three Ancients. His minions are weaker than those of the other Ancients and have no special abilities. He is associated with purple magick.
Mantorok is depicted as a large amorphous mass made entirely of mouths and eyes. At one point he had a more defined shape, but a binding spell cast by Pious has incapacitated him in the temple.