User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/Ruadan - an enemy of both Arthur and Morgana?/@comment-4623180-20121001104851/@comment-4623180-20121001120721

Yes, but Mordred is/was a druid, and will probably fight with a sword. I don't think an episode synopsis lies.

And yeah, Ragnor seems like a strong possibility.