Traditionally, the silver bullet is the only kind of bullet for firearms that is effective against a Werewolf, witch, or monster. The idea of the werewolf's supposed vulnerability to silver probably dates back to the legend of the Beast of Gévaudan, in which a gigantic wolf is killed by a person wielding a gun loaded with silver bullets. In the Brothers Grimm fairy-tale of The Two Brothers, a bullet-proof witch is shot down by silver buttons, fired from a gun.