Phantazia was next seen in the altered reality of the 2005 "House of M" storyline. After the timeline was restored, she was confirmed as one of the many mutants who lost their powers on M-Day. She is held in S.H.I.E.L.D.'s psychological ward, apparently having been reduced to a partial catatonic state by the trauma of the reality shift. S.H.I.E.L.D. Director Maria Hill states in a conversation with Iron Man (Tony Stark) that Eileen has been muttering the words "House of M" repeatedly in her cell for some time after losing her powers.