X-Factor #79 (1992) (High Grade)

Multiple Man and Quicksilver must take down a mutant music teacher gone rogue. But when Rhapsody uses her powers of mind manipulation, will the heroes fall under her musical spell? The first appearance of Rachel Argosy, the mutant known as Rhapsody!

Quicksilver and Multiple Man try to rescue a mutant that uses music as a power source. Sadly, she is very much insane.