As an action, make a melee weapon attack with advantage against a creature that is below half its health.
On a hit, add the stamina die to the attackās damage.
On a critical hit, add twice as much damage.
On a miss by 4 or less, add half as much damage.
Until the start of your next turn, if you are within 10 meters of a creature that you can sense that is below half its health, any attack you make against a creature not below half its health is made with disadvantage.
Enhance
You can increase the damage for each additional stamina die expended.