*What happens when Gotham's Clown Prince of Crime discovers a thousand-year-old relic that will make him invincible? Unfortunately, Batman is about to find out! Be there for the first meeting between two of comics' greatest madmen, as the Joker and the Mask join forces (literally) to give the Dark Knight a run for his money! Don't miss out on the mayhem! Co-published with DC Comics. *Soruce: darkhorse.com