Mystery Men Comics #21

Mystery Men Comics #21 is an anthology featuring multiple heroes. "The Green Mask and Domino" follows the Miracle Boy Michael Shelby, who gains super-human powers from a vita-ray machine and adopts a distinctive costume to fight crime alongside his boy helper Domino; the story involves a threat from the drug expert Dr. Charles Doe. "Zanzibar" depicts the villain Zanzibar (the disguised Chen Chang) attempting to steal plans and wreck a train trestle, but ultimately being defeated when a bronze bookend strikes his head during a struggle with detective John Geer. The cover prominently features the Blue Beetle, with additional stories starring Rex Dexter and The Lynx.