Justice League of America #56
In "The Negative Crisis on Earths One-Two!", the Justice League of America joins forces with the Justice Society of America to confront the Black-Sphered Villains on Earth-2, where artificial black matter dangerously empowers four heroes—nearly turning them to villains. Written by Gardner Fox and illustrated by Mike Sekowsky, with inks by Sid Greene and lettering by Gaspar Saladino, this 1967 issue delivers a tense, mind-bending crossover where the heroes’ own subconscious strength becomes the key to victory. The cover by Carmine Infantino and Murphy Anderson captures the cosmic stakes with striking precision.
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The JLA and JSA team up to stop the Black-Sphered Villains on Earth-2, using artificial means to power up four of their own with black matter, but it almost backfires when the four heroes become evil. The remaining heroes are then subconsciously helped by the four heroes into defeating them by exposing their weaknessses. These same weaknesses are then used vs. the four earlier-charged normal persons, who then lose their powers as well. Things are returned to normal on Earth-2, and the four Leaguers return to their world to stop the charged persons there using the same weaknesses.
Plot details indexed by the Grand Comics Database (CC BY-SA).
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