Masque was originally a prominent member of the sewer-dwelling community of mutant outcasts called the Morlocks, led by Callisto.

[5] Masque later joins in on Callisto's kidnapping of Shadowcat (Kitty Pryde), to force her to go through with her promise to marry Caliban in exchange for his assistance in getting the Morlock, Healer, to help Colossus, after being left melted by Pyro and flash-frozen by Avalanche using liquid nitrogen.

[7] Masque joins a quartet of mutants known as "The Tunnellers", who ultimately are taken in by X-Factor in the aftermath of the Marauders slaughtering the Morlock community.

[8] They leave X-Factor's headquarters, but cause chaos in the city of New York as Masque mutilates the faces of several gang members who kill one of the Tunnellers.

[9] With Callisto presumed dead, Masque begins work on consolidating power among the Morlocks living under X-Factor's roof.

Callisto appears on several billboards in New York City, attracting the attention of the amnesiac Colossus (after having traveled through the Siege Perilous).

Luckily, Forge creates a device that resets Jean and Banshee's bodies to their original forms after they leave the Morlock tunnel.

[17] By this point, Masque is now training the Morlocks to become his own personal army and starts talking about staging raids against the people on the surface.

Prior to his death, Cable vows to decapitate Masque and carry his head on a pike into the Morlock tunnels as a warning to his people.

[20] Masque had gotten involved in the underground mutant gladiator circuit and had once again ensnarled Callisto, this time both enslaving her and giving her tentacle arms ala Jean Grey.

[21] Masque reappears, leading a band of Morlocks (including Erg, Litterbug, Skids, and Bliss) in search of Magneto, hoping to inform him of a prophecy that says mutants may yet come to rule the world.

During the following fight, Masque's ability to warp his body is revealed, as he briefly tricks the X-Men into thinking he is Leech before ultimately being defeated.

[24] Masque later appears as a member of the Utopians alongside Elixir, Karma, Madison Jeffries, Random, and Tabitha Smith.