Drevis Neloren

Drevis Neloren is an instructor at the College of Winterhold, where you can generally find him in his room on the bottom floor of the Hall of Countenance. He is a master Illusion magic user and, as such, he can train you up to level 90 in Illusion. After you officially become part of the College, he will ask you to don some magical gloves for a quest where you have to cleanse various leylines around the college, which nets you random qualities of soul gems. He will also give the Illusion Ritual Spell quest.