Master Comics #21 (1941)

Master Comics #21, a classic comic book published in 1941, features the superhero Captain Marvel, also known as Billy Batson, as he faces off against his archenemy, Dr. Sivana. In this issue, Dr. Sivana develops a plan to steal the energy of lightning bolts and use it to power his latest invention, the Inertia Beam. With the fate of the world at stake, Captain Marvel must stop Dr. Sivana before it's too late.

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