Read more about Zzzax at: Wikipedia

Official Site: Marvel

Zzzax is a fictional character that appears in comic books published by Marvel Comics. The character first appears in Hulk #166 (Aug. 1973) and was created by Steve Englehart and Herb Trimpe.

Debuting in the title Hulk, Zzzax is a humanoid creature formed from electricity by an act of sabotage at a Con Ed nuclear power plant in New York City. A group of terrorist destroying the dynamo started a chain reaction that causes a rapid build in energy, which takes on a life of its own and absorb the minds of the terrorists and several engineer. By using the electrical energy from their brain, the entity is able to achieve humanoid form and sentience. Calling itself Zzzax, the entity fights the Hulk and the hero Hawkeye before being defeated.

The character returns to the title Hulk and repeats its behavior at a research center in Chicago. The Hulk battles the entity to a standstill before several scientists shut the process that creates Zzzax. Zzzax reappears in the title Luke Cage, Power Man, and hunts the men responsible for its last defeat. Cage defeats the entity, but not before it kills one of the scientists. Zzzax returns in the title Hulk to confront an intelligent version of the monster (possessing the intelligence of Bruce Banner), but is quickly defeated. Demon Mephisto reforms the entity in the limited series Secret Wars II, although it is defeated by Fantastic Four member the Thing. In the title West Coast Avengers the character Zzzax teams with fundamental force villains Graviton; Quantum and Halflife, but is shortcircuit by Hawkeye.

The title Hulk details how Zzzax is eventually captured and contained by the spy organization S.H.I.E.L.D., who transport it to Gamma Base. General Thunderbolt Ross, long-time foe of the Hulk, arranges for his mind to be transferred into Zzzax's body and battles a new version of the Hulk, Rick Jones. Ross relinquishes control of the entity soon after saving his daughter Betty Ross Banner, realizing that his actions had risked lives. Zzzax battles hero Iron Man in the title Marvel Comics Presents and outsider Cable in the self-titled series.

Zzzax has not been a contender in any CBUB matches.