This carbon copy of Thor was created by Professor
Zaxton and his Duplicating Machine (could make an exact copy of a person but with opposite personalities). This doppelganger was created to battle the real Thor so Zaxton could escape punishment for his crimes. Thor and his evil twin battled briefly. Due to the evil nature of Zaxton's duplicate, he was unable to wield Mjolnir's power. This led to his quick defeat from the real Thor and he faded into nothingness.
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