Dark matter

Dark matter in his true form

Dark matter is an one eyed dark god who was worshipped by ancient civillizations he likes possesing people and whatever. I guess he is the supreme ruler of evil and shit but that place is taken. he has various cults that worship him, (Déja vu?) And is one of the main antagonists of post timeskip fanboy & chumchum

He is also the brother of Phantoon