 In all versions, the story initially revolves around a magical mask which bestows on its wearer reality-bending powers and an altered appearance, characterized by a large set of teeth and a green head.The mask affects the personality of the wearer by removing all social and moral inhibitions, causing the wearer to become insane.The character was inspired by a combination of the Joker and Steve Ditko's version of the Creeper, as well as Dr. Jekyll and Mr. Hyde.