One of the original serpents, Diamondback attempted to befriend Fer-de-Lance on her arrival at the Serpent Citadel. Fer-de-Lance expressed a romantic interest in Sidewinder, but after informing her that Sidewinder was involved with her teammate Black Mamba, Diamondback offered to set Fer-de-Lance up with another teammate, Rattler. Fer-de-Lance remained with the Society after King Cobra took over as leader, and clashed with Captain America again, among other heroes.