Players are coven members who are blood bound: what one witch does affects another member of the coven. Black magic begets corruption, which is given to other members.

Each witch starts with spells that they know, but throughout the game can gain corruption to learn new spells, and get familiars and artifacts. But how they choose to use these new cards each Hour – whether as Black and/or White magic, will determine the successful completion of the Scene (mission).