@CertifiedFool_ I'm reminded of the villain (whose name escapes me) who was a waterbender that made a pair of prosthetic whips out of water. Shit was cool and made for an interesting fight!
@h0neypups Serial killer is defined by three or more kills with a distinct "cooling off period", so I think Ghostface would be a serial killer. A mass murderer is usually only contained to a single event.