Superman #7/1970

In "Das Geheimnis des Kryptonit ultra!", Jimmy Olsen falls seriously ill with a mysterious virus that can only be cured on the Moon—leading him to a shocking discovery there: a dying Superman, weakened by a strange and deadly form of Kryptonite-Ultra. Written by Leo Dorfman and illustrated by Curt Swan with inks by George Roussos, this 1970 tale blends sci-fi mystery and superhero vulnerability, with a Moon-based twist that redefines the limits of Superman’s endurance. The cover, penciled by Swan and inked by Murphy Anderson, captures the eerie isolation of the lunar setting.