Dormammu (Earth-8011)

"Before all was, I was. Before time was, I waited. I fed on the screaming souls of the universe. I drank the spoiled milk of dead stars. I am the emptiness outside all understanding. I am Dormammu."

- - Dormammu to the Justice League and the Defenders

Dormammu was the Lord of Chaos and one of the Old Ones who feast upon the dimensions across the universe. Dormammu and his kind destroyed many civilizations, almost succeeding against Thanagar, who managed to expel him. Turning his attention to Earth, Dormammu fought against the planet's Atlanteans, and was banished to the Phantom Zone by the city's king, Neptune, at the cost of the city. He then became an enemy of the Defenders, attempting to enter on Earth once more.