Room of Wild Magic
From Mistipedia
The Room of Wild Magic in Castle Avernus heightens wild magics.
Under 2nd Edition rules effective caster level receives +2 bonus and saving throws suffer a -2 penalty.
Additionally, any spell cast in the room, without regard to school, has a 10% chance of causing a wild surge. Azalin detests this room, keeps it magically locked, and has no desire to confront enemies in it.