When a creature attacks another creature in NWN2, that attack is divided into three phases: * The Attack Roll to determine if the attack hits its target. * The Critical Hit confirmation roll, if the attack hits and the attack roll threatens a critical hit, to determine if the attack was a critical hit. * The damage roll to determine how many hitpoints a creature loses from the attack. The basic damage roll consists of: Ability Modifier affecting damage + base weapon damage+ Enhancement bonus + Other damage modifiers In the case of a critical hit this formula becomes: