Collector's Note: The image on the card is Tombstone, not Hammerhead.
*First appearance: Amazing Spider-Man #113.
A small-time criminal so obscure that his true name is not known, Hammerhead became the experimental guinea pig of a corrupt scientist named Jonas Harrow. These experiments resulted in the unique reconstruction of his previously shattered skull. Once again out for blood, Hammerhead tried to wrest control of New York's criminal underworld, putting him on a crash course with Dr. Octopus, the Kingpin, and Maggia boss Don Fortunato.
Power: Reinforced skull that enables him to attack with devastating head butts. *Source: Back of Card