He was one of the four Marauders, under the alias "Wormtail". Peter Pettigrew was an Animagus who could transfigure himself into a rat, kept as a pet by the Weasley family (who did not know his true identity), named Scabbers, for 12 years, so that he would be safe, after betraying the Potters, by revealing their whereabouts to Lord Voldemort. He is the only known Gryffindor to be involved in the Dark arts, and was present at the rebirth of Lord Voldemort, presenting the "willingly sacrificed flesh of a servant". He cut off his hand, but Voldemort gave him an artificial one made of "some silvery liquid". In Harry Potter and the Deathly Hallows, in the cellars of Malfoy Manor, the artificial hand forces him to strangle himself.