Mister Mxyzptlk

Mister Mxyzptlk (Mxy) is a Superman comic book character created by DC Comics. In the classical mythological interpretation, he is frequently depicted as a trickster deity. Mxyzptlk is a reality-warping superhero who enjoys taunting Superman and making life difficult for him. In some media, he has been portrayed as an obvious supervillain, while in others, he has been portrayed as an antihero.

Mr. Mxyzptlk was created by writer Jerry Siegel and artist Ira Yarborough for the story "The Mysterious Mr. Mxyztplk" (the original spelling) in Superman issue 30 (September / October 1944). Due to a publishing lag, the character debuted in writer Whitney Ellsworth's and artist Wayne Boring's Superman daily comic strip.

In most of Mxyzptlk's DC Comics appearances, the only way to stop him is to trick him into speaking or spelling his own name backward (Kltpzyxm kel-tip-zix-um), which will send him back to his fifth-dimensional home and keep him there for at least 90 days. The character's limitation was changed in the 1986 Crisis on Infinite Earths reboot, when Mxyzptlk's condition was changed to leave a new requirement in each narrative, such as having Superman succeed in convincing Mxyzptlk to paint his own face blue.