Cards effects can combine in unexpected ways. Hence, if one player plays a multiplier, and two players play an inverse card, the multiplier will be left untouched (due to the effect cancelling itself out after being applied twice). Similarly, a multiplier played by one player can be stolen by a second, which can then be inverted by a third, much to the regret of the second player. Since cards are selected (in secret) ahead of time, it is usually difficult or impossible to predict the exact outcome if several players have a choice of such cards.