Shen Xorn

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.

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.

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 the young 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 believed all of his attempts to protect mutants 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.

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.