User blog comment:Merlinloverxx/What happened to.../@comment-5995315-20130128172540

That didn't happen in the last episode. That was Morgana's dream in Season 3, I think. It was to tell her that Emrys would be her destiny and her doom.

The plan for that scene changed. Katie McGrath said Morgana's actual death in the last episode was her and Colin's idea, and it was meant as a parallel to the scene in season 2 (The Fires of Idirsholas) where Merlin first tries to kill her.