THE ULTIMATE GUIDE TO DICE

When an amount is to be subtracted, the notation is nds-c or nDs-c; so 3d6-4 instructs the player to subtract four from the result of rolling 3d6. If the result of a modified dice roll is unfavorable, it is commonly taken to get zero or just one; By way of example, if the dice roll determines the quantity of harm to a creature.[41][42] The US term