Your defensive mastery is complete. In addition to the bonuses of Stalwart Defender I and II, this prestige enhancement increases your armor class by 1, grants +2 to your intimidate skill, increases your maximum dexterity bonus allowed by medium or heavy armor and shields, and grants additional armor class and damage reduction when blocking with a shield. In addition, when you have a one handed melee weapon and shield equipped, your DR is upgraded from DR 4/- to DR 6/-, and you now generate 75% additional threat with melee attacks. You may expend a use of Fighter action boost to to enter a defensive stance.