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John Corben, who is either a con-man or a soldier, depending on which era he's appearing, is either mortally injured or volunteers for an experiment, resulting in mad scientists bonding his body with robotic pieces which are powered by a heart of Kryptonite â and giving him strength that rivals Superman's, and bonding him with the iconic hero's greatest weakness.
Appearing to be the most evil, deranged, and flat out psychotic killer of all comic book villains, The Joker is the primary antagonist of Batman. ... The Joker also has a melted cliche clown face, the origins of which differ depending on the continuity he is used in.