The Doctor: The Carrionites vanished. Where did you go?
Lilith: The Eternals found the right word to banish us into deep darkness.
The Doctor: Then how did you escape?
Lilith: New words. New and glittering. From a mind like no other.
The Doctor: Shakespeare.
Lilith: His son perished. The grief of a genius. Grief without measure. Madness enough to allow us entrance.
The Doctor: How many of you?
Lilith: Just the three. But the play tonight shall restore the rest. Then the human race will be purged as pestilence. And from this world, we will lead the universe back into the old ways of blood and magic.