Cynan hires Glyndyn, a former student of Merlin's, to drug Dylan so he will be comatose and mistaken for dead even by Merlin, and has a henchman approach Camelot claiming to witness Valiant, whom Dylan has captured, kill him. Denys is invited to see Cynan and, with Merlin, goes only to return Dylan's body. Cynan plans to have Dylan actually kill Valiant when he receives the antidote for the potion he took. And he not only succeeds in causing Denys doubt in his friend's innocence, but causing Valiant doubt over whether Denys has now chosen to stand with his family.
—brainybrailler@comcast.net