Mister Mxyzptlk

Background
A being from the 5th-dimension, Mister Mxyzptlk visits Superman ever ninety days with a challenge, causing magical mischief and games that can only end when Superman tricks him into saying his name backwards.

Strategy
TO BE ANNOUNCED

Quotes
TO BE ANNOUNCED

Trivia

 * Mister Mxyzptlk first appeared in Superman #11 (November 1987)