Superman Unlimited (Superman Unlimited #10)

It's said that the sun is always shining on the city of Metropolis... but lately a shadow has fallen. This shadow has a name, and it's on the lips of the terrified citizens of the city of tomorrow tonight... it's the horrible new form of the Prankster! The all-new, mysterious Prankster was the deadliest assassin in the DC Universe, someone with a perfect record of kills... until Superman saved one of his victims. And that makes the Man of Tomorrow his next target.