The Cailleach in “The Darkest Hour (Part One)”

I am the Cailleach, the Gate Keeper to the Spirit World. You have torn the veil between the worlds. [A Dorocha screams from the tear in the worlds behind the Calilleach]. The Dorocha- they are the voices of the Dead, my child. Like the Dead, they are numberless. You are right to be afraid, Morgana, your enemies will woe this day and all the destruction it brings, but you must be prepared. Tearing the veil between these two worlds has created a new world, and you will not walk through it alone. The one they call Emrys will walk in your shadow. He is your destiny and he is your doom.