towards their elders for all that had happened to them. When the young Morlocks, now calling themselves Gene Nation, returned to Earth with revenge planned, she went looking for help and located her former love Colossus, who had recently returned to Earth after the fall of Avalon. The two returned to the X-Mansion to warn the X-Men that Gene Nation was planning to kill innocents for every Morlock killed during the Mutant Massacre. Drawing Storm and Wolverine into the tunnels, she witnessed as Storm fought Marrow in a duel that saw the X-Man once more resort to lethal measures to win. Callisto remained in the tunnels looking over Marrow until she became injured during the events of Operation: Zero Tolerance. Recovering from her wounds, she told Marrow to find a place amongst the X-Men, figuring it to be the best place for her. Callisto also has a maternal relationship with Marrow, acting as a mother-figure towards the young mutant, though the two are not biologically related, making her the only person Marrow would follow nearly blindly. After the six-month gap and Marrow's departure from the X-Men, Callisto disappeared. Later, Callisto was once again transformed by Masque, having her arms reformed into tentacles. Callisto was also under Masque's control in "The Arena," an elite fight club in Japan. Callisto and Storm battled each other in the Arena, but later both escaped with help from Storm's friend, Yukio. Genoshan Excalibur She was one of the main characters in the 2004 Excalibur title, where she was helping Professor Xavier and Magneto rebuild Genosha. This alliance briefly reunited her with Archangel. Son of M In the aftermath of House of M, Callisto is among the many mutants to have lost her powers. Quicksilver offered to her the Terrigen Mists, stolen from the Inhumans, as a way to restore her powers. Callisto willingly accepted the offer and the Mist effectively restored all her previous abilities (minus her disfigurements and arm-tentacles), but without any control over them. Her new senses are so acute that even a drop of rain causes her tremendous pain; unable to handle it, she fell into a coma. The depowered Magneto found her body and showed it to Quicksilver saying that he poisoned her with the Terrigen Mist. He later took her body to a hospital, where the effects of the Mists wore off. X-Cell Callisto was later reunited with Marrow as