User blog comment:Longlivemerlin/Temporary? Or Permanently? Magic reveal talk! (SPOILERS FOR EPISODE 12 & 13!)/@comment-5653093-20121218110554/@comment-4892425-20121218114314

I agree that Morgana's spell is going to backfire because she is reaching out to Emyrs to help her. ("It this what you wanted Morgana?")  Morgana's lack of knowledge that Merlin's the son of a dragonlord is also going to be her undoing. Kilgarrah, I think, is going to kill Aithusa (red dragon takes out white dragon according to legend); then take out Morgana's forces. Merlin kills Morgana with Excalibur. I agree the news about Merlin is going to drive her to complete madness, another factor to her inevitable downfall.

As for Arthur, I think he'll fall at Calmann but Merlin will revive him. It's still Arthur's destiny to bring about Albion. The writers have always tweaked the legend. (e.g., Uther did not die by Morgana's hand) so I'm hoping for the best.