The "Emperor Joker" storyline crossed through several comics as The Joker obtains the ability to alter reality, becomes Emperor of the Universe, and set the world into a repetitive loop. Every day, he tortures and kills Batman, brings him back to life, and starts over the next day. Superman must face-off against The Joker to save the fate of Batman and the universe. Collects SUPERMAN #160-161, ADVENTURES OF SUPERMAN #582-583, SUPERMAN: MAN OF STEEL #104-105, ACTION COMICS #769-770 and SUPERMAN: EMPEROR JOKER #1.