A powerful and mysterious mutant, Phantazia was recruited into the Brotherhood of Evil Mutants by Toad. She proved to be a valuable asset when she disrupted Cannonball's blast field, allowing her teammate Sauron to supposedly kill him. She also participated in the battle against X-Factor, where she was able to disrupt Quicksilver's mutant powers, but she was later defeated by Havok.
Magneto apparently noticed Phantazia, and had Exodus invite her to Avalon, the mutant sanctuary, where she could join the Acolytes. She reluctantly declined, opting to stay with her friends in the Brotherhood. However, the Brotherhood soon disbanded, and Phantazia disappeared from the super-villain scene.
Although she was seen as a royal guard in House of M, after M-Day, Phantazia lost her mutant gene and went insane. One of the few characters to have any recollection of the event, Phantazia was locked in a padded cell in S.H.I.E.L.D.'s facility.