Zorn's History
The X-Men found a mutant similar to Kuan-Yin Xorn. While quarantined he was examined by Emma Frost. He explained that he was Kuan-Yin's twin and his brain formed a black hole rather than a star. He claimed his brother had been affected by an outside influence, later revealed to be Sublime, that caused his madness and posing as Magneto.
While the X-Men faced the Brotherhood, Xorn removed his helmet to draw them into the black hole, including Juggernaut and Nocturne. Afterwards, he wanted some time to meditate on the subject instead of joining the team like his late brother. The black hole inside of Shen Xorn's head led to the Mojoworld where the Brotherhood members gave Juggernaut and Nocturne to Mojo for their freedom. Juggernaut and Nocturne later found a way to escape Mojo.
Hunt for Healers
Despite having lost his powers during M-Day, Shen seemingly regained them some time later. He was visited by M of the X-Men, who attempted to warn him about the Dark Riders, who were hunting down mutant healers. Shen declined her offer for protection however, telling her that he preferred to stay where he was.
Shortly after his encounter with M, Shen was confronted by the Dark Riders Barrage, Hard-Drive, and Deadbolt. They attempted to kill him, but Shen easily killed Barrage, prompting Hard-Drive and Deadbolt to escape, vowing to return with greater numbers. The Riders were later killed by Magneto and his X-Men.
Magneto later visited Shen in order to be healed. Shen agreed to help him. Magneto trusted Shen enough to watch over the Sleepers with the intention to have them protected while at the same time having them at his disposal in case the were needed. When the united X-Men factions launched an attack on New Attilan as part of a plan to destroy the Terrigen Cloud that caused M-Pox, Magneto had Xorn and the Sleepers march and become the overseers of the Inhuman population held captive at their home. When his leadership caused conflict between those under his care, Shen began to doubt himself. After the conflict with the X-Men ended, Shen relocated to the Blue Area of the Moon and left the Sleepers under the stewardship of Archangel.
Secret Empire
Before putting in motion a plan to take over the United States, Hydra's leader, the Cosmic Cube-altered Captain America, made a deal with Emma Frost, which resulted in America's mutant population being displaced to a sovereign state in the West Coast that became known as New Tian. Furthermore, Rogers had Emma telepathically control Xorn, using him as a front for her reign while she schemed behind the scenes. This fact was unbeknownst to everybody else, even the advisors of New Tian's supposed ruler.
Mothervine Crisis
Following the fall of Hydra's empire and, as a consequence of that, New Tian, Xorn disappeared. He was eventually tracked down by Toad and the New Marauders on behalf of an alliance between Havok, Emma Frost, Miss Sinister and Bastion so that he could join their ranks. After he refused, the New Marauders tried to kill Xorn, but he was saved by Jimmy Hudson and Bloodstorm.
In turn, Xorn joined a patch-work auxiliary lineup of X-Men, since most of the team was off in space at the time. These X-Men helped fight against Bastion's attempts to capture some of the new mutants that had surfaced as a consequence of the global release of the Mothervine virus. They then attempted to take the fight to the masterminds of Mothervine, but were defeated.
Xorn and the rest of the X-Men were freed by Emma Frost after she decided to turn against Miss Sinister and the rest of the alliance. When Emma Frost and the X-Men confronted the remaining members of the Cabal, Xorn decided to sacrifice himself, since he felt that all of his attempts to protect mutants had only resulted in tragedy. Shen unleashed the full power of the black hole within him and drew Bastion in, but was absorbed as well in the process and seemingly died.
New Life on Krakoa
Along with Kuan-Yin, Shen was presumably returned to life by the The Five, a group of mutants capable of combining their powers into a process of resurrection, brought together by Charles Xavier as part of his plans for mutant ascension. The two brothers remained in the mutant-nation of Krakoa, founded by Xavier and his allies. He was one of the teleporters recruited into S.W.O.R.D. to form part of their teleport team.
The brothers were eventually hired by Legion to follow him around and disintegrate his brain if he ever lost control of his powers. They also assisted him in his attempt to root out Onslaught, who had taken root in Krakoa. They used Loa and Mercury to set a trap for Onslaught and when Onslaught possessed everyone in The Green Lagoon during a meeting between Legion and Xavier, the three ended up killing everyone there.
The brothers guarded Legion as he created the Altar, a non-Euclidian psychic habitat where they could defeat Onslaught. The brothers helped buy Legion time by battling Onslaught when it manifested fully. The mutants of Krakoa were successful in defeating the psychic entity.
