Arclight

Arclight is a mutant and member of the Marauders where she used her shock wave powers to lead them and went against the X-Men.

History
Before joining the Marauders, Philippa Sontag once served in the military's special forces during the war in Vietnam. The traumatic experiences there led to her powers awakening enabling her to create shock waves through physical contact and she became a body builder. She used her deadly skills in combat and joined the Marauders in what would be a deadly attack on the under-dwelling Morlocks' community. She became second in command of the team behind Scalphunter during their first attack where she killed dozens of Morlocks. She later joined Superia's Femizons female based team.

Though the details of her recruitment by Mister Sinister to the Marauders remain unrevealed, she has participated in all of the Marauders' major operations. Due to Mr. Sinister cloning its unclear if she is the original or a clone.

M-Day
After the events of M-Day, Arclight became a resident at the X-Mansion and was one of the few mutants that still retained their powers. She eventually left the Mansion and became a member of the New Marauders alongside her fellow partner Scalphunter and newcomers Lady Mastermind and Sunfire. She later appeared as a seemingly mindless slave that attacked the X-Men. During this, Arclight was seemingly killed.