This may have been done already, but I have a devastating merthur fic idea. Merlin’s magic is revealed by accident and Arthur’s fear and hatred of magic eclipses rational thought and he immediately kills Merlin. Except Merlin is immortal so he doesn’t die. So then the rest of the story is both of them dealing with the consequences: Merlin knowing that his paranoia wasn’t misplaced and his friendship with Arthur wasn’t enough and Arthur having crazy trust issues and has to deal with the horror that he killed his best friend.
Of course it somehow works out in the end but the angst road to forgiveness would be very long.


















