If damage is 3d6 + stat - DL and the PCs take damage when they roll under the opponent DL, but the monster don't have stats other than their HD, DL and morale, does that mean that is posible to take no damage at all?
For example if I roll under DL 20 (because is a 1HD monster) and the 3d6 damage result is 15, I would be taking 0 damage because 20 - 15 = 0?