Marvel Two-in-One (1974) #18
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Characters
Realizing the criminal potential of his abilities, Umberto stole a flock of trained birds from a fellow performer to assist him in his new costumed criminal guise as the Scarecrow.
The radiation that mutated Reed Richards, Sue Storm and Johnny Storm into superhuman beings had also mutated Ben Grimm, transforming him into a grotesque, rock-hided strongman dubbed the Thing.