Iridescent

Merlin would do anything for Arthur. In turn, Arthur would do anything for Merlin. And when Morgana attacks Camelot, that very brotherhood is put to the ultimate test. With Morgana ruling and Merlin powerless to stop her, it's up to Arthur to save Camelot and his best friend. The only thing is, he's supposed to be dead. By Merlin's hand. Rated T for violence. Post 4x03. No slash.