56. Dormammu

You couldn't miss Dormammu if you saw him. Flames coming out of his head, he and his sister Umar were part of the energy-based extra-dimensional Faltine race. Their greed got the best of them, though, and they began bonding matter to themselves to further gain power.

Dormammu is composed of pure energy and his raw magical power as a sorcerer is basically unmatched. He can replenish these powers by worship in different dimensions. He can also transmutate matter, teleport through those dimensions, time travel, and he is said to be even more powerful than Mephisto. He's a genius too and also has mystical strength and speed. He also looks like Ghost Rider if Ghost Rider would be caught dead in something purple and red.

Being a representative of Lord Chaos, he battled Odin in cosmic chess to a draw. Odin wanted the draw, mind you. Dormammu would have kept playing. He even once beat Eternity in chess. Eternity, like the time and space eternity. Yeah.

His biggest nemesis is Dr. Strange, and he has allied himself with Baron Mordo against the good doctor. Strange is the love interest of Dormammu's sister's daughter, Clea, so maybe that has something to do with it. He's just being a good uncle! Dormammu has also allied with Loki in a war with the Avengers. He's taken possession of Doctor Strange's body, he along with his sister once beat Eternity and remade the universe and he also is the demon behind the powers of The Hood.