Rex Mason (Earth-9107)

Rex Mason is Metamorpho, the Element Man. He can alter his body into chemical elements. He has been a member of the Outsiders and the Terrifics.

Rex was forced by Simon Stagg to transmute into Nth Metal as apart of his plan to open a portal into the Dark Multiverse. Metamorpho would work with Mister Terrific and Plastic-Man force Stagg into close the portal. However all three are sucked into the portal and shielded by Plastic-Man who is immune to the Dark Multiverse. While in a lifeless void Rex and the others would encounter Phantom Girl who reveals that she is stuck in an intangible state and was unaware she was responsible for sending a signal to pull Rex and his team to her location. It was revealed by a hologram of Tom Strong who reveals that Metamorpho and his allies are needed to save the multiverse. Rex is later sent by Mister Terrific back Stagg's compound only for him and his new friends are drawn back together. It's revealed that he can't separate from the others. Upon find this out Rex and his new allies form the The Terrifics.