Superman #213 2005

Superman #213 (January 1969) presents "The Most Dangerous Door in the World!" In this Silver Age story, Superman, with assistance from Supergirl and Brainiac 5, devises an elaborate scheme to outwit Lex Luthor. Luthor, believing he is stealing Superman's final gift from a special vault, inadvertently frees the Man of Steel who was magically trapped by the villain Mordru. This issue is notable for its clever plot involving a complex ruse and classic hero-villain confrontation.