Dormammu

History
Dormammu is an interdimensional demon. He rules the Dread Dimension, a supernatural world full of demons. He has attempted to invade the Earth thousands of times, but is always thwarted by the Sorcerer Supreme. Dormammu harbors a special hatred for Dr. Strange. They have fought countless battles, but Dr. Strange has always won. Dormammu recently tried to kill a weakened Strange, but the Avengers saved him.

Powers

 * Magic: Dormammu has immense magical abilties, so strong they can challenge Dr. Strange
 * Mindless Ones: Dormammu has an army of Mindless Ones, demons that only exist to serve him