Appearance: Daring Mystery Comics #3 (April 1940).
Golden Age Appearances: Daring Mystery Comics #3-5.
Modern Appearances: None.
Years Active: 1940-?
A group of aliens observe the Earth from their home in the Fifth Dimension. They decide that humans would make good slaves, and so they create a vaguely human-looking android to help them enslave homo sapiens. They name this android 'Marvex.' But when Marvex discovers their plans he goes rogue and kills the aliens. He then wrecks the lab, causing a strange explosion which sends him to Earth. Once here he decides to help humanity by becoming a superhero.
Marvex is made of "fabri-steel," a "strange metal" which renders him invulnerable and bulletproof. Marvex has superstrength, can run at super speeds, and can perform Hulk-like leaps. He has an advanced mechanical brain can send radio messages via his mind.