Superman #18/1969

In "Teil 1 - Die Todeswette," Superman and Batman are mysteriously transported to the alien world of Garenvol, where the inhabitants place a deadly bet on their survival in a one-on-one fight. Stripped of his powers, Superman must rely on his wits and courage while facing an opponent who’s no stranger to the dark side. Written by Robert Kanigher and brought to life by Ross Andru’s dynamic art with Mike Esposito’s inks, this gripping two-part story begins with a high-stakes gamble on a distant planet. The cover by Curt Swan and Neal Adams captures the tension perfectly.