As an action, make a melee weapon attack against a creature after you move at least 3 meters straight toward it.
On a hit, add the stamina die to the attackās damage and if the creature is your size or smaller, it must succeed on a Reflex saving throw or you knock it prone.
On a critical hit, add twice as much damage.
On a miss by 4 or less, add half as much damage.
Enhance
You can increase the damage and target a creature of a larger size for each additional stamina die expended.