Depression Vengeance.

Peter's final form. Peter is 3x larger than before. He grows wings out of his stubby arms. A giant hand snaps out of his chest. Crying is audible, but so is screaming. You have killed one of Peter's friends, and a life is too important to waste. To watch a life go with their blood stained onto your hands, Peter will kill you. Good luck Wendigo, you'll need it, you MURDERER.