Superman #221
In "The Revolt of the Super-Slave!", Superman is honored with a sacred ritual drink by an alien race—only to find the ancient scarlet nectar has turned toxic. Though his invulnerability protects him from immediate harm, the unexpected chemical reaction triggers a sudden, alarming weight gain. Written by Cary Bates and brought to life with Curt Swan’s iconic art and George Roussos’s inks, this 1969 classic features a cover by Swan and Murphy Anderson that captures the moment of Superman’s shocking transformation.
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As a reward for helping irrigate their planet, an alien race bestows on Superman the honor of drinking the sacred scarlet nectar, which had not been bestowed for 25 years. Unfortunately, it had undergone a chemical change and become poison. Superman's invulnerability partially saved him, but instead caused a large weight increase.
Plot details indexed by the Grand Comics Database (CC BY-SA).
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