Gerald Stone was an idealistic scientist who wanted to find a cure for cancer. He conducted an illegal experiment on a homeless person named Jacob Eishorn. The experiment failed and Eishorn became a living cancer, who needed to kill to survive. Now calling himself "Styx", Eishorn enjoyed the killing of innocents. Feeling responsible for Styx, Stone built high-tech weaponry for himself and turned the two of them into a mercenary duo. Stone hoped that as mercenaries, Styx wouldn't kill innocents, but by now Stone was willing to kill anybody to protect Styx. He planned on using the money they earned as mercenaries to find a cure for Styx.
On their first outing, the duo was hired by Johathon Caesar, a millionaire obsessed with Mary Jane Watson to kidnap her. This brought them into conflict with Spider-Man, Mary Jane's husband, who defeated the duo. Styx and Stone returned to Caesar, who told them to try again. This time, the duo faced Spider-Man who was at the time in conflict with Venom. During the fight, Styx's touch nearly killed Venom and they were returned to prison.
A third meeting with Spider-Man involved the vigilante Cardiac. Cardiac's alter-ego, Dr. Elias Wirtham, had been a good friend of Stone and offered to cure Styx. Cardiac was convinced that Styx couldn't be cured or redeemed and tried to kill Styx. Spider-Man stopped Cardiac and the two fought, while Styx and Stone attempted, in vain, escape.
Members:
Styx
Stone
Equipment:
The Turbo Hopper
