Justice League of America #27

In "The 'I' Who Defeated the Justice League!", the League faces an unseen enemy from beyond dimensions whose very existence depends on their failure. Written by Gardner Fox and illustrated by Mike Sekowsky, with inks by Bernard Sachs and letters by Gaspar Saladino, this 1964 classic sees the team confront a foe who exploits their victories—forcing them to reawaken the dangerous Amazo, whose power surge threatens to spiral out of control. The cover by Mike Sekowsky and Murphy Anderson captures the tension of a team pushed to their limits.