The guy in the tunnel in Halas has me runnin back n forth to Tethelin to talk to some archer, that seeks special arrows. He needs them to be made from ancient treant branches. I have searched multiple treant locations, but haven't seen or looted any. Can anyone help with a location? Also, is this quest worth doing, reward or xp wise? I don't see too much chatter about it, but I'm willing to try anything once.