As an action, make a melee weapon attack with a weapon that you wield in two hands that deals piercing damage and then whirl your weapon around. Each creature within your weapon’s reach must make a Reflex saving throw.
On a failure, it takes piercing damage equal to the stamina die.
On a critical failure, it takes twice as much damage.
On a success, it takes half as much damage.
On a critical success, it takes no damage.
You can increase the damage for each additional stamina die expended.