WHY did Nimue not melt into dust when she drank from the grail? The man that was with MERLIN in the beginning of the episode .. melted into dust when he drank from the grail and I presumed it was because he had an impure heart. I think Nimue had a dark impure heart as she was consumed with vengeance and revenge. She should have melted away into nothing when she picked up and drank from the cup. . .