Piercing Strike (鎧通し, Yoroitōshi?), also known as Armor Breaker and Armor Break, is a recurring ability in the series. It deals physical damage while ignoring target's Defense and/or bypassing its Protect.
Armor Breaker is a Commando passive ability exclusive to Paradigm Pack monsters that boosts Strength when an enemy's physical resistance is set to 'Resistant' or 'Halved'. It can be learned by Chichu (17), Dragoon (20), Dreadnought (20), Flanborg (4), Gandayaks (20), Gilgamesh (1), Golden Chocobo (40), Hoplite (15), Lightning (1), Meonekton (20), Narasimha (46), Proto-behemoth (27), and Scutari (19).
Deal physical damage to one target, ignoring its Defense.