There is 25 cards to the set, one is on how to use them, they are made from plastic, there are 8 sets of three off each type, these can ether be played on your turn or your opponent turn ether to help you or disrupt your opponent.
You throw a dice to see weather you can use them or not in the game.
Example, one card can reduce movement to 1”, this would be played on your opponent during him making a move.