Turn in 1 saltpeter to the haversack to increase your attack by +1.
Important: Typically, you may only use 1 saltpeter. However, if your knight is involved in the attack, you may use as many as needed! Additionally, any of your pawns may use weapons to increase your attack by +1 or +2. Saltpeter and/or weapons may be added even after your opponent ﬂips over a defend action card.