Mister Mxyzptlk

Mr. Mxyzptlk ( /mɪksˈjɛzpɪtlɪk/ US dict: mĭks·yĕz′·pĭt·lĭk or /mɪksˈjɛzpɪtəlɪk/ US dict: mĭks·yĕz′·pĭt·l·ĭk), sometimes called Mxy, is a fictional impish supervillain who appears in DC Comics' Superman comic books. He was created by Jerry Siegel and Joe Shuster, and first appeared in Superman #30 (September 1944). He is usually presented as a trickster, in the classical mythological sense, in that he enjoys tormenting Superman. In most of his appearances in DC Comics, he can be stopped only by tricking him into saying or spelling his own name backwards (Kltpzyxm - "kel-tip-zix-um"), which will return him to his home in the 5th dimension and keep him there for a minimum of 90 days. However, this specific limitation of the character has...