Molyb Metal Master is an
Astran, a humanoid alien with the ability to manipulate metal. He was banished from his home planet of Astra for trying to conquer it. After arriving on Earth, the Metal Master attacks
Gamma Base and defeats the
Hulk when he refuses to join him. The Hulk returns with a plastic weapon; the Metal Master's powers cannot affect the gun, causing him to be caught off guard and easily defeated. The Metal Master later returns to Earth, seeking large amounts of metals that the Astrans thrive on. There, he encounters the Spaceknight
Rom and attempts to control his metal armor. Rom resists him, and the Metal Master is nearly driven mad by the thought of a metal that he cannot control. Sometime later, the Conclave of Seven Planets sentences Metal Master to a deep space torture prison. He becomes acquaintances with his fellow cellmates
Black Bolt,
Absorbing Man, Blinky, and
Raava. He and his fellow inmates escape after Absorbing Man seemingly sacrifices himself to help Black Bolt kill the torture prison's Jailer. After escaping, Metal Master decides to atone for his past crimes. ==Powers and abilities==