Wikipedia
Piecepack
Piecepack is a public-domain game system that can be used to play a wide variety of board games, much as a standard deck of cards can be used to play thousands of card games. Piecepack has been used by dozens of different game designers to create over 150 different board games and is available from many different manufacturers.
The system consists of 24 tiles, 24 coins, 4 pawns, and 4 dice.
The Mystique Deck has been designed to use the same 4 suits (Suns, Moons, Arms, and Crowns), for compatibility with the Piecepack system.