Zzzax is a supervillain from Marvel comics. It was created in a freak accident when an electromagnetic experiment exploded and absorbed the electronic impulses from the brains of nearby humans, killing them and giving the electricity sentience. Zzzax is made of living electricity, and thus is virtually indestructible. It can fire powerful blasts of energy, incinerating anything it touches. It also possesses superhuman strength, and can fly.
In order to exist, Zzzax must draw energy from the electropsionic energy of people's brains. By doing so, it kills them, and increases its own intelligence. For some reason, Zzzax found this form of murder pleasurable, and undertook doing so whenever it had the chance. The only enemy it can't seem to kill is the Hulk, one of its common foes.
He appears as a villain in the 1996 animated series The Incredible Hulk as well as in Earth's Mightiest Heroes, Ultimate Spider-Man and Avengers: Assemble. He appears as the main antagonist of the direct-to-video animated film Heroes United: Hulk and Iron Man.