The Mirroring of Mary King is a 2-player game in which one person plays a mortal woman named Mary King and the other plays the ghost of her ancestor. Each player uses control cards and power cards to exert their influence over the mortal Mary King's psyche to gain possession of her body. Mary's psyche is represented by 12 tiles arranged in a 4 x 3 grid. These tiles are flipped back and forth between mortal and ghost control during game play. The game progresses over five days, starting on Monday and ending on Friday. Each player gets one turn each day. At the end of each player's turn, both players suffer penalties to their mind based on the number and arrangement of psyche tiles controlled by their opponent.