Saboteur

Sabotage an enemy's infrastructure to delay his or her troop deployments.

You may play this card at the beginning of an opponent's turn to prevent that player from receiving any new armies during his or her turn.  Your opponent should set aside all of the new armies he or she would have received.  At the beginning of his or her next turn, your opponent receives these delayed armies in addition to the new armies he or she receives normally on that turn.