Though it's hard to know how this will help, Alice has pinpointed his position based on his voice.
Oh, this helps a lot! I can now finally set everything on fire! This should prevent the guy from hiding again. He's either burning and smoking or - if he extinguishes the spell with water magic - dripping wet. I'll find him. Actually I don't even have to. I'll let the fire and smoke do the work for now.
A shame I probably can't convince the bugbears since nobody takes me seriously. Well, I tried to be nice! Going all out next round, gotta see where the fire spreads first!