Metallo (John Corben) is a comic book supervillain and cyborg who appears in Superman stories published by DC Comics. Metallo's trademark is his kryptonite power source, which he often uses as a weapon against Superman.
Metallo is a radioactive cyborg intelligence who depends on Green Kryptonite as his energy source, making him an enemy of Superman. He is a former soldier who was used in experimentation by the United States Army, eventually giving him the ability to project his consciousness into any technological device. His powers also include the ability to morph the machinery in his body accordingly.