The term 'Mystical Board' is a reference to the Ouija board, a flat board marked with the letters of the alphabet, the numbers 0-9, and the words 'YES', 'NO', and 'GOODBYE'. It is used as a tool for communicating with spirits. The board is usually used in a group setting, with participants placing their hands on a planchette, a small heart-shaped piece of wood or plastic, which is then moved around the board to spell out messages.