Very little is known about the man known as Cottonmouth. He was somehow contacted by
Sidewinder and invited to join the criminal organization called the
Serpent Society. Accepting the offer, Cottonmouth's first major success was slaying
MODOK alongside teammate
Death Adder. His next mission had him battling
Captain America with Death Adder,
Rattler, and
Diamondback. They were all defeated and imprisoned, but later freed by Sidewinder.
When the
Viper infiltrated the Serpent Society, Cottonmouth feigned siding with Sidewinder, but quickly betrayed their former leader. He went on to serve with the Serpent Society with
King Cobra as leader. He also encountered
Black Panther and battled
Luke Cage. His most recent activity has seen him allying himself with
Hawkeye to escape from prison.
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