Serpents Of The World Unite! Synopsis for "Serpents of the World Unite!" Serpent Society: Cottonmouth (First appearance) Diamondback (First appearance) Asp (First appearance) Bushmaster (First appearance) Sidewinder invites villains with serpent like powers to join him in creating the Serpent Society. Constrictor would rather work alone and tries to sabotage one of their first missions by calling the Avengers. Captain America follows the anonymous tip and comes across Anaconda, Rattler and Cobra stealing equipment from the Brand corporation. Anaconda is defeated by Captain America but is retrieved later by Sidewinder.