If in battle an enemy has an AC of 19 and I Roll a 20 on the die with a negative modifier for a third attack is it consider a critical success still if the modifier drops it below 19. Also If I roll a 1 and my modifier of +11 on first attack lets say brings it above AC 11 of the creature, is that consider a hit not a critical failure. I thought 20 and 1 were still their respective critical success and Failure with the added 10 higher or 10 lower addition to rules?