Orrick

Physical description
Orrik wears all gray robes, and has gray hair. He flutters around his tower, looking at old tomes with admiration. He carries no weapon, but you can tell he coud disarm the burliest of fighters with a single look. He is about five and a half to six feet tall. He has gentle eyes, and he welcomes you, but only if you have a purpose.

Help in Icewind Dale II
Orrik will tell you many things, including the fact about the radiant pool that will harm Isair and Madae if you purify it.