Cortez was the leader of the Acolytes and used his powers to bolster Magneto’s own abilities. However, Cortez’s extreme anti-human sentiments led him to betray Magneto and try to kill him, framing Professor X, Beast, and Gambit, capturing and torturing the latter. Cortez threatened to destroy Earth but was stopped by the X-Men and Amelia Voght, who revealed Cortez’s betrayal to the other Acolytes and the entire mutant population of Asteroid M. He was trapped in Asteroid M by a vengeful Magneto, but was rescued from its destruction by Apocalypse and Deathbird.
Apocalypse granted him the ability of altering the mutations of other mutants. Cortez next reappeared, now turned into a servant and worshiper of his savior. Cortez assembled a cult worshiping Apocalypse as well as the Hounds, a foursome of altered mutants, in an attempt to find a new body for Apocalypse (who was previously defeated and left bodiless). Cortez captured Jubilee and turned Beast into a feral monster but was stopped by Caliban (who was one of the Hounds). After being defeated, Cortez begged Apocalypse to be forgiven for his failure. However, Apocalypse was not angry and simply took possession of Cortez's body.
When the Multiverse was destroyed in the last incursion between Earth-616 and Earth-1610, Doctor Doom, with Beyonder's powers, recreated it in the form of Battleworld. Earth-92131 was recreated in the Westchester domain, ruled by Baron Kelly.
The Shadow King realized that in comparison to those other domains, Westchester was a fragile paradise, and set out to ensure its survival by any means. Using the cloned body of Professor X, the Shadow King became Cassandra Nova, and used his new identity to become a politician and establish the Bureau of Super-Powers.
At the Clear Mountain, Cassandra Nova used a form of psychotherapy called the "Mind Field" to brainwash those mutants who arrived to the institute and force them to live in harmony, Cortez was one of those mutants.
- 10 appearance(s) of Fabian Cortez (Earth-92131)
- 9 image(s) of Fabian Cortez (Earth-92131)
- 1 quotation(s) by or about Fabian Cortez (Earth-92131)