ISBN: | 978-5-5090-6063-2 |
High Quality Content by WIKIPEDIA articles! 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. His traditional identity is John Corben. The character first appeared in Action Comics #252 (May 1959).