Action: Piranha Assault

Frequency once per 10 minutes

You know that a thousand small bites can fell a large foe just as surely a single well-placed hit. Designate a creature within the aura of your commander's banner and signal all squadmates; for 1 minute, each time they attack that creature and deal damage to it of a type the creature resists, they ignore an amount of that creature's resistance equal to your level.