The three effects it can activate are fear, sleep, and wrath.  (That's in addition to the Wisdom-loss effect, which it constantly exudes.)<br/><br/>Wrath is the one I figured for a real killer.  It's awfully hard to stop teammates gone nuts when the effect isn't even magical!  (The DC's not too high, I think it's 16, but in a level 6 party you'll probably have a couple people fail that.)  But unless we get really creative, the radius is too big to use inside our dungeon.