Xacu was a member of the Watchers who whose wife died from the radiation emitted when they were observing the birth of a new galaxy. He traveled to the Watcher's homeworld to grieve which caused psionic feedback to affect the Bidoceros from a neighboring planet. He was visited by Hulk and Amphibion when they wanted access to the Ultimate Machine, and Xecu granted access and agreed to move the planet to help the Bidoceros. After the pair returned from their experience in the machine, Xecu returned them both to their home-worlds.
Powers and Abilities
As a member of the Watcher species, he possesses all the powers of his species.