As Mr. Mxyzptlk comes to this dimension to challenge Superman. All Superman has to do is get Mxyzptlk to say his name backwards to get him to return to his own dimension.
Notes:
The first post-Crisis appearance of Mr. Mxyzptlk.Mr. Mxyzptlk took the identity of a man named Ben DeRoy.Ben DeRoy is an anagram and a homage to Marvel's Beyonder.Old Man Superman, Fat Superman, (Ugly) Weird Superman and (Large Head) Strange Superman were homages of the Silver Age Superman.
