Muto is a 30th Century villain, who is the archnemesis of that era's Superman. He is a human mutant, who has no hair, yellow skin, and an enlarged head. He has telekinetic powers, which he uses in conjunction with his scientific ability.
Origin
Sometime in the 30th Century, a little boy accompanied his parents aboard a survey ship, which was tracking a meteoroid headed for earth. When the Superman of the time (Superman 2999's father) destroyed the meteoroid, it opened a singularity in space, which sucked the survey ship into an alternate dimension.
The dimension that they landed in was inhabited only by robots, as all the biological life was long-since dead. The robots experimented on the boy, altering him genetically and giving him several powers and traits of their own robotic race.
As a result, when the boy returned as Muto, a being with powerful telepathic abilities, he saw humans merely as servants and schemed to take over human civilization.