Javitz is a giant with enormous strength and durability, who is missing his right eye. Javitz is one of the Acolytes who helped kidnap geneticist Moira MacTaggert. The group keep her in their current headquarters in a facility in France. Javitz says he's been watching the X-Men pursue their cause for "years" before throwing himself in the fray. When they battle the X-Men, he seems particularly contemptful of Cyclops, whom he tries to kill. The X-Men ultimately defeat the Acolytes and rescue Moira. With a group of Acolytes, he battles X-Factor. With the other Acolytes, Javitz leaves Fabian Cortez thanks to Exodus, and rejoin Magneto; they appear at Illyana's funeral, where they recruit Colossus. The X-Men attack Avalon, and Javitz assists the Acolytes in defending it.
Omega Red attacks the Tyuratum Space Center, thinking they have the cure for his virus, and Cable arrives with a group of the Acolytes under a truce a few hours later. Milan finds the center's director and reads his memories, learning that Omega Red found what he wanted, and the Acolytes tell Cable that Omega Red will need to go into space to administer the cure. They travel to Magneto's old Arctic base to teleport to Avalon, but Cable finds that Omega Red has already been captured at the base by the Acolytes, who reveal the trap they have laid for Cable as well. Cable is able to stop the Acolytes from using Omega Red in their plan to release his virus as a shield to keep humans from getting to Avalon. Javitz is later present at the trial of the Neophyte, where Colossus is forced out of the Acolytes.
Javitz is present with the Acolytes and X-Men when the universe is destroyed and replaced with the Age of Apocalypse. The Age of Apocalypse universe ends, and the mainstream universe is restored. The mutant Holocaust survives his alternate universe's destruction and somehow appears in the mainstream universe when it is restored; he is brought on board the space station Avalon, the homebase of the Acolytes. Holocaust awakens and consumes Milan and Rusty Collins. After a running battle, Holocaust kills Javitz as well.