Slytherin "Or perhaps in Slytherin, You'll make your real friends, Those cunning folk use any means, To achieve their ends." —The Sorting Hat[src] Slytherin is one of the four Houses at Hogwarts School of Witchcraft and Wizardry, and is traditionally home to students who exhibit such traits as cunning, resourcefulness, and ambition. Its emblematic animal is the snake and its colours are green and silver. The house ghost is the Bloody Baron. Founded by Salazar Slytherin, the house is composed mostly of pure-blood students, due to its founder's mistrust of Muggle-born witches and wizards. Slytherin house has a negative reputation, with many claiming that it is the source of most Dark Wizards in Britain, notably Tom Marvolo Riddle, who later became Lord Voldemort, as well as a large majority of his Death Eaters. It has a traditional rivalry with Gryffindor. Slytherin corresponds roughly with the element of water.[8] Founder Salazar Slytherin House colours Green and Silver Animal Serpent Element Water