After the match, men wearing the masks of Death Eaters, followers of Voldemort, attack the camp site, causing terror and abusing the Muggle campsite owners. The Dark Mark is fired into the sky, causing mass panic. Harry discovers that his wand is missing. It is later found in the possession of Winky, Barty Crouch's house elf, and the wand is found to have been used to cast the Mark. Although very few believe Winky could have conjured the Mark, Barty Crouch dismisses Winky from his service. Hermione, angry at this injustice, forms a society to promote house elf rights, known as S.P.E.W. (Society for the Promotion of Elfish Welfare).