As an action, make a melee weapon attack with a weapon that deals bludgeoning damage to debilitate the creature.
On a hit, add the stamina die to the attack’s damage and the creature must succeed on a Fortitude saving throw or it only deals half damage until the end of its next turn..
On a critical hit, add twice as much damage.
On a miss by 4 or less, add half as much damage.
You can increase the damage for each additional stamina die expended. This augment also causes the creature to be debilitated for 1 minute/stamina die. At the end of each of its turns, a debilitated creature can repeat the saving throw, ending the effect on itself on a success.