The Knights of Walpurgis were the forerunners  of the deatheaters. They were a motley collection, the ambitious seeking some shared glory and the thuggish gravitating toward a leader who could show them more refined forms of cruelty. Rigidly controlled by the charming, manipulative and enigmatic Tom Riddle, they were never detected in open wrongdoing, but their years at Hogwarts were marked by a number of nasty incidents. The seven slytherin boys are attractive, sociopathic and dark wizards.  