User blog comment:Morganaforever/Episode Review: The Diamond of the Day Part 1/@comment-5829707-20121223054011/@comment-5829707-20121224153602

I agree with Sweetnatured, really liked your comment. The slug could take away Merlin's power because he had not yet come into his own. He did not have the confidence to believe that he had the power, so he lost his magic. Merlin needed to enter a deeper realization of who he was. Also, the slug cannot kill Merlin because Merlin will always be, he cannot die.