The Formidable Five
The Coven was an ancient group of witches lead by The Crone who served The Evil as faithfully as one could ever serve. Two thousand years ago the four witches were burned at the stake and buried in the cemetery above Dale. The Crone escaped, barely, and placed herself in a magical slumber
When Midras “Manyfriends” smoke the Devil’s Grass with four women, they became susceptible to possession and the witches had been lying in waiting all this time. When the four women entered Dale so did the four witches enter them. So the new, but ultimately still the same, Coven became:
Back from the dead, so to speak, The Coven raised The Crone from her slumber and decided to finish what they had started 2000 years ago; annihilating Dale and all it’s residents.