I was just fighting the Anvil of Dumathoin on his last level. I had a character who could shoot three rows standing in her starting position. He drops a boulder on her for no damage. Then he uses his sword for no damage. She got hit with like three more boulders for no damage. It was great to get this glitch since Anvil of Dumthoin has that cheap sword attack, but I wanted to mention it so no one would think I was cheating. Not sure how it happened.