I've played this game twice now and I can't get over how good it is at creating intriguing relationships and character dynamics, as well as guiding incredible story-crafting and world-building. I feel like I could play it a dozen more times with the same group and have a completely different experience every time, but always with the same quintessential feeling.
I'm shocked no one else had posted about it on ao3 before me, it's such an exceptional story-making engine. The striking and blackening mechanics make for the juiciest character development, and the consequences for failing a challenge have never failed to drive the coven somewhere interesting.