Justice League of America #39
In "Starro the Conqueror!", the Justice League of America faces a mysterious threat when members suddenly lose their powers—only to discover a string of bizarre thefts tied to creatures known for longevity. With Flash tracking down a stolen catfish and a cicada, the team splits up to investigate other long-lived beings, each encounter leading them into a trap set by the power-stealing android Amazo. Written by Gardner Fox and illustrated by Mike Sekowsky, with Bernard Sachs handling inks and Gaspar Saladino on letters, this 1965 issue features a standout cover by Mike Sekowsky and Murphy Anderson.
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As several JLAers experience a sudden power loss, Flash finds that someone has used powers like theirs to steal a European catfish and a cicada. Snapper suggests the thefts have to do with someone researching immortality, and the JLA splits up to investigate other long-lived creatures. In every case, the JLAers come up against Amazo, who steals their powers, defeats them, and takes them to his creator's lab, where Professor Ivo is preparing an immortality serum. Green Lantern is able to use the weakness of his own ring against Amazo and Ivo, restore the JLA's powers, and defeat the villain.
Plot details indexed by the Grand Comics Database (CC BY-SA).