10 Best Superman Villains Of All Time
#10 METALLO

Metallo has had several different origins, the basic idea remains the same: John Corben, who is either a con-man or a soldier, depending on which era he's appearing, is either injured or volunteers for an experiment, resulting in mad scientists bonding his body with robotic pieces which are powered by a heart of Kryptonite, which makes him a combating threat.