Room of Enchantment
From Mistipedia
The Room of Enchantment in Castle Avernus heightens enchantment magics.
Under 2nd Edition rules effective caster level receives +2 bonus and saving throws suffer a -2 penalty.
Room is protected by a permanent Emotion spell that attempts to cause fear. Under 3rd Edition rules that spell no longer exists and fear effects are necromantic magic. A Confusion spell would be a good substitute as it, like Emotion, doesn't effect undead.