(Uncanny X-Men I#300 (fb) - BTS) - The mutant Isaac Javitz grew frustrated with the X-Men as he observed their actions over the years. He felt the mutant heroes were suppressing any mutant who didn't embrace the mainstream. Fed up with being oppressed by humans, he became a follower of the teachings of the supposedly deceased mutant savior Magneto. He eventually joined the Acolytes at their headquarters in France's Mont St. Francis monastery off the coast of Normandy.
(Uncanny X-Men I#300 - BTS) - The Acolytes abducted Moira MacTaggert from her lab on Muir Island to make her pay for her blasphemous sins against their lord (when he was a baby under her care, Moira had tampered with Magneto's genetic makeup in an attempt to prevent him from becoming the mass murderer they'd known). Fabian Cortez ordered the electropathic Acolyte Milan to use his powers to scan and record Moira's entire memory so they had a complete overview of all her crimes. However, Moira proved extremely stubborn and strong-willed, making accessing and processing even the smallest of memories an arduous task.
(Uncanny X-Men I#300) - When Cortez realized Moira knew he had killed Magneto, he ordered Javitz to bring MacTaggert to him so he could try and see what the effects of his power enhancing abilities would be on a human being. Just then, the X-Men invaded Mont St. Francis to rescue Moira. The Acolyte was immediately jumped by Colossus who mercilessly pummeled him until Isaac begged him to stop. He was saved from the attack by his teammate Carmella Unuscione who trapped Colossus inside her exoskeleton. Recovered, Javitz then attacked Cyclops, covering the X-Men leader's head with his massive hands while ranting about loathing the X-Men's placating tendencies. Cyclops soon freed himself and blasted Javitz through a wall, knocking him out.
(Uncanny X-Men I#300 - BTS) - After the X-Men successfully defeated most of the Acolytes, Amelia Voght used her powers to teleport all the Acolytes to safety.
(X-Factor I#92) - Javitz joined a delegation of Acolytes on a mission to a hospital in Wauntaugh, Virginia where they killed patients and personnel in Magneto's name for the simple crime of being human. Some time after that, Javitz and all the other Acolytes went to the military base Camp Hayden. Their leader Fabian Cortez wanted them to both destroy the Sentinel processing plant there, as well as kill Senator Robert Kelly who happened to be visiting the site. They found themselves opposed by the government licensed mutant heroes of X-Factor and their ally Random. Javitz focused on Strong Guy but was ill prepared for his opponent's ability to absorb kinetic energy to add to his own strength. Carosella allowed a wall to cave in on them, which greatly increased his powers. Strong Guy easily punched out Javitz as a result. The battle ended when Fabian Cortez failed to convince X-Factor member Quicksilver to join them as his father's successor. Amelia Voght once again used her mist teleportation to take her teammates away.
(Uncanny X-Men I#304) - At their temporary headquarters on board the sunken submarine Leningrad, Javitz and his fellow Acolytes learned from the mysterious Exodus that their leader Fabian Cortez had been responsible for the supposed demise of their lord and savior Magneto. He watched as Cargill, Unuscione and the Kleinstocks furiously jumped Cortez and started pounding on him. Exodus then established himself as the new leader of the Acolytes, taking them away from Cortez to Salem Center, New York. They arrived in time to see how Magneto had come to disrupt the funeral of Illyana Rasputin to announce his return. Milan and the others were thrilled to see Magneto had survived and were all lifted back to Avalon, except for Senyaka who Magneto pulped on the spot for perceived transgressions. Some time later, Isaac and the Acolytes were joined by their latest member Colossus who following his sister's death had lost faith in Charles Xavier's dream.
(X-Men II#25) - Javitz and the other Acolytes were present when Magneto decided to strike back after Earth's governments agreed to initiate the Magneto Protocols (theoretically barring them from returning to Earth). He watched as the master of magnetism went out into space to make short work of the satellite system used to enact the protocols. He unleashed a planetary wide electromagnetic pulse wave that wreaked havoc with electrical systems, injuring and killing thousands of people. Later, when a team of X-Men led by Charles Xavier infiltrated Avalon, all the Acolytes were taken out of the fight when Xavier used the station's teleportation systems to transport Magneto's followers to a number of pre-launched escape pods in orbit of the space station.
(Cable II#10 (fb) - BTS) - Even though Cable thought he had disabled Avalon's teleport systems by rerouting the bodysliding program it was based on, the electropathic Milan managed to undo his handiwork. As a result, the Acolytes could freely move to and from Earth again. However, they still weren't able to access other parts of Cable's old orbiting base, which led them to consider recruiting his aid.
(Cable I#11 (fb) - BTS) - The Acolytes decided to secure Cable's services through an elaborate plan that involved using the deadly Omega Red to get him to cooperate with them.
(Cable II#9 - BTS) - Amelia Voght, Milan, Katu and Unuscione sought out Omega Red in London and offered the killer a way to rid himself of the death spore plague inside his body that was slowly killing him. Intrigued, Omega agreed to work with the Acolytes and went off to collect a number of artifacts needed to help him contain the infection. His first stop was Muir Island where Cable happened to be staying.
(Cable II#9 - BTS) - Cable proved unable to stop Omega Red from taking off with a biocellular subcutaneous matrix stabilizer. Just before Cable could go after Omega on his own, Katu and the other Acolytes showed up on Muir Island to offer their aid.
(Cable II#10 (fb) - BTS) - The Acolytes only told Cable half of their story: they claimed that they'd offered to help Omega Red in hopes of having him join their cause, only for him to betray them. Cable took Voght at her word, but packed extra ammo just in case he was wrong. Cable and the Acolytes followed Omega Red's trail of death and destruction to Russia's Tyuratam Space Center where he'd killed the research director of project Epsilon, but not before extracting the data from him he required. Using his portable monitor-feed, Milan electropathically replayed the man's final memories and confirmed Omega Red had indeed been there. Because the cure the Acolytes had proposed could only be safely administered in space (if something went wrong, the death spore virus would become airborne and wipe out mankind). Therefore, Amelia Voght reasoned Omega Red wanted to reach Avalon and the only way to get there was by using the teleportation systems inside Magneto's arctic base. Cable agreed to accompany the Acolytes there.
(Cable II#10 - BTS) - Javitz and the other Acolytes, led by Colossus, were already at the arctic base where they laid a trap for Omega Red and successfully captured him.
(Cable II#10) - Thanks to Katu's handiwork, Cable and the others entered the base. Inside, Cable ran into the defeated Omega Red and realized he'd been played for a fool. Voght explained the true purpose of their mission, even as Colossus and the other Acolytes came in to surround Cable.
(Cable II#11) - Cable managed to evade the Acolytes, using his innate control of the exotic, reactive base systems to his benefit. The Acolytes split up to search for him in the cavernous base. Javitz was paired up with the electropath Francisco Milan who was complaining the base's unique energies made it impossible for him to get a good reading on his monitor. This led the snarky strongman to comment that this made his teammate even more useless than usual. Before he could defend himself, Milan was surprised his monitor suddenly locked on to Cable's mind and showed a picture of himself hanging upside down. Seconds later, Cable dropped from the ceiling, grabbed Milan and pulled himself up through the ceiling again.
(Cable II#11 - BTS) - Cable knocked Milan out, thereby eliminating the Acolytes' sole way of tracking him.
(Cable II#11) - The conflict between Cable and the Acolytes ended when it became clear some of the Acolytes had planned to allow Omega Red to start the risky procedure that would cure him right there in the Arctic. They knew that the death spore virus would be released either way, wiping out mankind in the process. Teaming up with Voght, Colossus and a handful of Acolytes not willing to kill billions, Cable tried to stop Omega Red. In the end, it was the Acolyte Katu, who hated Red because he'd killed his wife and family years earlier, who sacrificed himself by turning his power inaward and seemingly evaporating himself and his opponent. Voght and Colossus took Milan and the other Acolytes back to Avalon.
(Uncanny X-Men I#315) -
The Acolytes eventually captured Neophyte and put him on trial aboard
Avalon for having aided the X-Men during their assault on Mont St.
Francis. He would have been summarily executed for his crimes, if not
for Colossus standing up for Hall and demanding at proper trial.
Javitz brusquely escorted the despondent Hall to his trial. During the
proceedings, Colossus defended Simon, pleading for his life and not
without success: instead of killing him, Exodus banished the boy from
Avalon back to Earth.(X-Men II#41) - When the intergalactic M'Kraan crystallization wave hit Earth, Javitz and the Acolytes were with the comatose Magneto in Avalon's throne room.
(X-Men Alpha#1 (fb) - BTS) - When the X-Men of Earth-295 came across the time-tossed Lucas Bishop, an attempt was made to access his memories of Earth-616. As a result, that reality's Erik Lensherr saw brief flashes of his counterpart, including his time in charge of Javitz and the other Acolytes.
(X-Men Prime#1) - When the Acolytes picked up a strange ice comet that appeared out of nowhere near Avalon, Javitz watched as Exodus sent out Cargill, Colossus, Milan and Rusty Collins for a spacewalk to check out the unknown objects. Milan used his powers to send all they observed directly back to Avalon where the zealous Exodus eagerly awaited the results. They concluded there was a man inside. Believing this to be an important portent and proof that great times were at hand, Exodus ordered them to return him to Avalon (unaware this "man" was actually the energy vampire Holocaust from Earth-295).
(X-Men II#42) - Javitz and the Acolytes joined Exodus in celebration over the fact they'd claimed the mysterious "child of the stars". All the while, the electropathic Milan was trying hard to make contact with their guest. As a result, he learned and revealed the strange being wasn't an alien at all, but rather an Earth-born mutant with one of the most powerful mutagenic signatures he'd ever seen. Despite the concerns voiced by Colossus, Exodus ordered Milan to continue his probings.
(X-Men II#42 - BTS) - After absorbing the lifeforce of both Milan and Rusty Collins, his dwindling energies were sufficiently replenished for Holocaust to make his presence felt. Exodus tried to oppose the creature, while a startled Amelia Voght acted on instinct and went to get help, inadvertently bringing Cyclops and Phoenix up from Earth to Avalon just as the conflict between Holocaust and Exodus was threatening to tear the station apart.
(X-Men II#43) - Javitz tried to help
Exodus by jumping Holocaust. Unimpressed, the energy vampire grabbed his
foe and casually consumed his energies before turning his attention to the
new arrivals from Earth who he mistook for their Earth-295 counterparts.(Heroes for Hire I#16 (fb) - BTS) - Somehow surviving the ordeal, Javitz rejoined Exodus and the Acolytes during their extended occupation of the High Evolutionary's Citadel of Science on Transia's Mount Wundagore. They soon found themselves in conflict with the Citadel's former inhabitants, the Knights of Wundagore led by Quicksilver. Exodus' reason for taking the Acolytes there was to secure Isotope E, an evolution controlling compound created by the High Evolutionary. However, the H.E. had taken the Isotope with him when he moved the Knights to Haven, a sanctuary near New York City.
(Heroes for Hire I#16) - After a convoluted series of events that saw the Heroes for Hire get involved in the ongoing conflict between the Acolytes and the Knights of Wundagore, it was revealed at Wundagore that the Man-Beast had been hiding among the Knights as Sir Anon. The sly Man-Beast had captured the H.E. and his Isotope E sceptre, threatening to kill him if the Knights didn't obey his orders. Exodus and Man-Beast agreed to a temporary truce when the Heroes for Hire came to Transia and attacked them. During the combat, Javitz and the others overwhelmed the severely outnumbered heroes who ultimately proved no match for their opponents and were defeated and imprisoned.
(Quicksilver#12 -BTS) - Using his superhuman speed, Quicksilver stole the Isotope E from the Man-Beast and freed the Heroes for Hire from the dungeons of Mount Wundagore. Forced to expose himself to the Isotope E, Quicksilver's powers grew exponentially until he was able to fight off the Acolytes and even managed to defeat their leader Exodus. Growing mad with power, Pietro demanded and got the Acolytes' loyalty. Just then, the H.E. announced his own godlike powers had been restored (at the cost of his sanity) and was ready to lead the world to the next phase of evolution.
(Heroes for Hire/Quicksilver Annual 1998#1) - When the H.E. and the Isotope E enhanced Quicksilver squared off, Pietro ordered the Acolytes to aid him. However, Javitz and the bulk of the team decided they no longer had a stake in the conflict. Refusing to fight other people's battles any longer, they left.
(Uncanny X-Men I#366 - BTS) - Javitz
rejoined the Acolytes in time to help Magneto in his latest world
conquering scheme. The Acolytes were sent out to keep the X-Men busy and
distracted until his preparations for shifting the Earth's magnetic
poles were completed (see comments).