Steely Strike p. 69
You focus yourself for a single, accurate attack, shrugging off your opponent’s blows and ignoring the need for defense as you make your assault.
The Iron Heart discipline teaches focus, allowing you to engage and defeat one opponent at a time. Your other enemies mean nothing to you as you press your attack.
You make a single melee attack as part of this strike. You gain a +4 bonus on the attack roll. All opponents other than the one you attacked gain a +4 bonus on attack rolls against you for 1 round.