User blog comment:Ḡwẵine Ḹٍٍkƨ Ĺiĸe Ͼềлȑềd/Arthur's Reaction After Learning Merlin's Magic/@comment-1402877-20120422213020

I think that Arthur might be okay with learning of Merlin's magic after learning all he did for him with magic. I think the real problem will come when he learns Merlin is Emrys/Dragoon. That'll be a big problem!