Superman #221

In a remote island stronghold, the tyrannical General Satanta exploits enslaved workers to harvest deadly flowers for nerve gas, while a defiant slave named Super-Pancho dares to summon Superman. When his desperate attempt to reach the Man of Steel is foiled and he’s forced into a makeshift costume for mockery, the ruse inadvertently draws Superman’s attention—leading to an unlikely alliance that could upend Satanta’s reign.

When an alien diplomat named Stros offers Superman the rare honor of drinking the sacred scarlet nectar, the gesture seems like a triumph—until the ancient elixir, altered over time, triggers an unexpected transformation. Suddenly, Superman’s invulnerability begins to backfire, causing his body to gain an impossible weight, leaving him struggling to move even as Lois Lane watches in stunned disbelief.

In "Part II: The Slimming of Superman!", Superman—still grappling with his sudden weight gain—pushes himself to meet an urgent deadline to return to his former physique. With Lois Lane watching closely, he trains relentlessly, nearly succeeding before resorting to a mysterious tool from another world to finish the job.