Captain America Vol. 1 (1968-1996) #413

Plot

As Captain America battles a horde of super-villains, Diamondback challenges Snapdragon to a rematch. Superia asks MODAM to join her in using A.I.M.'s money to fund her schemes, but MODAM is loyal to A.I.M.. Shang-Chi and Falcon discover neither are villains and team-up to rescue Cap. MODAM captures Superia and Allesandro Brannex, still alive, stands up and reveals that he's a Super-Adaptoid. Falcon retrieves Cap from the melee; he and Shang-Chi holds off the villains while Cap searches for Diamondback. Overcome with a thrist for vengeance, Diamondback drowns Snapdragon in a water fountain. Cap spies MODAM carrying Superia away from the island. Mistaking Superia for Diamondback, Cap attacks MODAM, causing her to drop Superia into the Atlantic Ocean. Realizing she's Superia, Cap dives in after her.