With a Vengeance is a music band featured in the novel, Dark Vengeance.[1] The band consisted of Karen Ashley—leader singer and flute player, Brodie Sparks—drummer, Lancer Dunne—bass player, and Daniel Knowles—keyboard player.
They were signed to perform at P3, with Karen's machinations to get close to Piper Halliwell and drain her powers. The rest of the band was unaware of her intentions.
Everytime Piper was there for a sound check, Karen would touch her with her flute to drain her magic after singing a song that would alter her mood.