I think it's the Aelfinn - they're the snakes right? I always get them confused. It just fits, like how they were moving like Myrdraal and had the sharp teeth. Mat was gloating so much about his defeating them at their own game that something had to go wrong. Also how Olver won at snakes and foxes without cheating - seems like something is happening with the Aelfinn to me. Deffinitly ruling out the evil Aiel. Anyone else think so?