An expansion pack on a deck of cards based upon the game of chess: The Rook, The Knight, and The Bishop.
You can see the first ever made Rook of Spades here. Subsequently there is also a Rook of Hearts, Rook of Diamonds, and Rook of Clubs. Adding these cards should make game play more interesting.
Rook originally meant a chariot, so the Rook represents a Charioteer holding the harnesses of the horses of his chariot. Likewise the attack of the chariot is certainly a powerful forward punch, as in chess and as it was in real life.
The Rook always has his helmet open and never holds a weapon, only the harness for the horses.
The knight's face guard is always closed and can hold any number of weapons. Typically the Knight of Diamonds holds a battle axe, the Knight of Clubs holds a Ball and Chain Mace, and the Knight of Hearts holds a spear tipped flag.
Thus we also have a Bishop of Hearts, Bishop of Clubs, and Bishop of Diamonds.
Finally there is one more card to add in a Chess Deck, the lowly Pawn, which you can see here.