Batman - Lepakkomies #5/1968

After escaping from the clutches of the Dynamic Duo, Rembrandt Dickens decides to pursue the life of a comic book artist, detailing the crimes he has committed. But when his gang is released from prison, Dickens gives each of them poison rings, one of which scratches the Batman, and he will die, unless he finds the latest copy of Batman Comics, which contains a clue to Dickens' whereabouts and antidote for the poison.