Is there nothing in the help tab? Bugger... it causes the critter to have an improved reaction to you (NPCs), and not go KOS (monsters) though a monster should still be drawn into combat if you attack his friends. It suppresses the heartbeat for 5 minutes (that's the auto-firing thing when you go near something set to react when you go near - the doorwarden outside the broken tower, for instance, or the guys in Lareth's room who talk to you when you walk in. Or drunken ol' Elmo looking for work) It also lowers the victims Spot and Listen scores for a few minutes. If the victim makes their save, they don't automatically attack you - I am assuming you're not standing there in their face casting it - but they will be on the alert with improved Spot and Listen for a few minutes. I've tried to cover a lot of the bases you might use the PnP spell for.
