The X-Man Jean Grey was once believed to have died as Phoenix on the moon, but was instead placed in a cocoon on the bottom of Jamaica Bay by the Phoenix Force to heal. She awoke in a changed world, where Charles Xavier was missing and Magneto was leading the X-Men. When she reunited with her teammates from the original X-Men class (Angel, Beast, Cyclops, and Iceman), the five decided Magneto was not to be trusted and Xavier's legacy must live on. Cyclops left his wife and son to reunite with Jean and his former teammates.
Warren Worthington used his company, Worthington Enterprises, to secretly fund the newly created private organization; X-Factor. Under the guise of humans using technology to hunt down mutants, the group investigated reports of mutant activity under the pretense of hunting down and capturing the mutant responsible. They were a mask for the team's true purpose, to help young mutants that might become victims of persecution. The were able to take in such mutants as Rusty Collins and Skids. Warren hired his old friend Cameron Hodge to publicize the company and keep spinning their web of lies. Hodge actually despised mutants and hoped X-Factors plan would intensify people's hatred of mutants
Under alias of the X-Terminators, they still went into battle as the outlaw mutant X-Terminators, "posing" as a regular mutant team.
During a mission to save the Morlocks from being massacred by the Marauders, Warren's wings were pinned to the wall by the Marauder Harpoon. His wings were severely injured to the point that amputation was necessary for him to live. Distraught by this experience, Warren attempted suicide, and was believed dead, although he was actually rescued by Apocalypse. Warren agreed to serve Apocalypse in return for his new cybernetic wings. Apocalypse warped his body and mind into his own "Angel of Death," and placed him into his team of Horsemen. As Death, Warren fought the rest of X-Factor, but was soon brought out of his brainwashing and rejoined the team as the somber and brooding "Archangel."
Eventually Madelyne Pryor, that the woman who Scott had married while Jean had been in suspended animation, went mad, developed vast powers, and became known as the Goblin Queen. It was discovered Madelyne had been a clone of Jean Grey created by Mister Sinister. Madelyne had been a failed experiment until she was brought to life by the portion of Jean's consciousness that had been borrowed by the Phoenix Force and a spark of the Phoenix Force which had been rejected by Jean's body while in the cocoon. She attempted to sacrifice her and Cyclop's son Nathan atop the Empire State Building to permanently open a gateway between Earth and Otherplace. The Goblin Queen died in combat with Marvel Girl. As a result of a psychic link, Jean acquired the memories of both Madelyne Pryor and the Phoenix's duplicate of her. Jean also acquired a spark of the Phoenix Force but managed to keep it mostly suppressed until she was able to expel it while helping an alien race fight off a Celestial.
Baby Nathan came to stay with X-Factor, but was later infected with a techno-organic virus by Apocalypse. As the virus spread through Nathan's body, threatening to turn Nathan into a body of liquid metal and organic steel, a member of the Clan Askani appeared from 2000 years in the future to Cyclops, saying Nathan would become a savior in their time, and that the Clan would cure him of the virus. Choosing to save his son's life, believing that he would never see him again, Cyclops agreed, and Nathan was taken 2000 years into an alternate future, where he would eventually become the man called Cable.
The original X-Factor eventually returned to the X-Men after Professor X returned from space. A government agency later took on the name X-Factor.
Equipment: None known.
Transportation: None known.
Weapons: None known.