Bio: In underworld circles, John Corbin had made a name for
himself as a cold, soulless mercenary and hit man. He was finally
brought to justice by Superman, after stealing the Lexcorp's Defense
Weapon, The Lexosuit. Luthor secretly used a corrupt doctor from
Striker's Island Prison, where Corbin was being held, to help the
Luthor then approached Corbin with an offer - a billion dollars to
destroy Superman. Luthor's plan was to place Corbin's human mind inside
a superstrong Kryptonite-powered android body. In this new form Corbin
could battle the Man of Steel to a standstill, then finish him off with
a blast from his Kryptonite "heart". But once inside the android body,
Corbin discovered he could no longer touch or taste. He had made a "deal
with the devil" for wealth and incredible powers, but in doing so lost
the one bit of humanity he still had. Corbin's grief drove him mad and
he tore away the synthetic skin covering his metallic skeleton.
Taking the name Metallo, the rampaging cyborg set out on a path of
destruction as he hunted down the one he believed responsible for his
tragic condition -- Superman. In his cyborg state, Metallo is incredibly
strong and can match superman blow for blow in a fight. He's also
powered by Krvptonite, and can fire beams of Kryptonite radiation
through his eyes. He can expose the meteor in his chest cavity to
Superman, weakening his enemy even more.
For more on Metallo, check out his
Justice League bio.