In the 1940s, Donnelly Ferguson played the role of the Scarlet Snake, a cunning mobster who controlled half of Astro City's underworld activities. He eventually "retired" and somehow lost the bulk of his wealth. Ferguson then became a crime broker. Based in Kiefer Square, he specialized in arranging "jobs" between black masks(super-villains) and those that neededtheir special services. He was also active in other illegal activities, trading caches of illegal, knock-off goods to hoodlums in the Sweatshop area.
In the 1960s, Ferguson helped arrange for young Carl Donewicz to become a subject in Dr. Norton Ganss's experiments, transforming Carl into the Steel-jacketed Man, aka Steeljack.
As a broker, Ferguson was involved with many black masks, including: Handgun, Goldenglove, Steeljack, The Mockery, The Chain, Wolfhound, Longhorn, Muscleman, Jackdaw, Glue-Gun, The Fog, Strangematter, Smoke & Mirrors, the Mock Turtle, and Goldenglove II.
When black masks from the Kiefer Square neighborhood were being serially murdered by a mysterious killer, Ferguson helped arrange for Steeljack to investigate these deaths. He also raided his personal warehouses for high-tech blasters which he distributed to the residents of the Keifer Square so they could defend a slightly inept but scientifically clever villain called the Mock Turtle. He was being pursued by the Chessmen, a group of thugs from England.
After the Conquistador's Plot was foiled, Ferguson fled Astro City. He died in 2007. He is buried in Kiefer Square cemetery.
He wields a special blaster or gun with an asp-like charger or sights.