REX MASON was an adventurer who worked for billionaire SIMON STAGG to retrieve a rare Egyptian artifact, the "ORB of RA". Mason dated Stagg's daughter, SAPPHIRE, which antagonized Simon . While in the pyramid,in Egypt, he became exposed to a radioactive meteorite from which the "ORB of RA" was fashioned. A tremendous flare-up of its radiation transformed MASON into METAMORPHO. He gained the ability to shapeshift and change himself into any element found in the human body, or any combinations thereof hence he is also known as the ELEMENTAL MAN! METAMORPHO like MARVEL'S The THING could not assume his human normal appearance, because he was no longer composed of flesh, blood and bone but ELEMENTS! He considered himself a non-human freak because of his abilities and wanted to be restored to normal. He turned down the offer to join the JUSTICE LEAGUE because of this. Later once he got used to himself he did! Metamorpho had a female counterpart: a woman named Urania "Rainie" Blackwell who exposed herself to the Orb and called herself: ELEMENT GIRL.