DC Universe Online has introduced their Saint Patrick’s Day event by using a lesser-known impish character named Mister Mxyzptik. He first appeared to annoy Superman in Metropolis and existed primarily as a humorous, comedy effect character. Hailing from the 5th Dimension he spread mirth and mayhem using his powers, called Superman names, and required the Man of Steel to get Mxy to say his own name backwards.

A few episodes of the animated series and editions of the comics feature Mxyzptik. He is about as close to a leprechaun that DC Comics gets and thus he’s perfect to celebrate the holiday in game.

Link, via MMO Anthropology and YouTUBE.