The Nameless one also known as the Mad God was Nalar the Midkemian Greater God of Evil. During the Chaos Wars it was he who cause the Valheru to rise up against the Lesser Gods and in turn caused the Lesser Gods to rise up against the Greater Gods. During the Chaos Wars both Ishap and Arch-Indar died so the other Gods with no way to offset his Evil nature combined their powers and banished him. They sealed him underneath a mountain of a world so vast that Midkemia would be like a pebble on its beach in another Universe and there he will remain until Ishap and Arch-Indar gain enough followers so that they can return and he can be released. He is called The Nameless one because even to imagine his name is to become his creature.