During the Emperor Joker event, reality was twisted by one of Batman's most disturbing villains using Mr. Mxyzptlk's stolen magic. The Joker reimagined Superman as a criminal in Arkham ...

this variant was an artificial construct created by the magical fifth-dimensional imp Mr. Mxyzptlk and given to Lex Luthor. This non-radioactive Kryptonite eliminated Superman’s powers until ...