“The Man Who Mastered Magnetism!”
Dr. Polaris is a scientist who has studied magnetism as a means of helping people, but when he infuses his body with an overdose of magnetic energy he turns to crime and Green Lantern must stop him.
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Green Lantern #21 (1960) is issue #21 of DC's Green Lantern (1960–1986), with a cover date of June 1963. Written by John Broome and Gardner Fox and drawn by Gil Kane.
Credits, characters and story details from the Grand Comics Database, CC BY-SA 4.0.