As an action, you can make a weapon attack in an attempt to knock the creature off balance with your blow. Add the stamina die to the attack’s damage (add half if you miss by 4 or less). On a hit, if the creature is your size or smaller, it must succeed on a Reflex saving throw or you move into the creature’s space, and it moves 1 meter in a direction you choose.
You can increase the damage and target a creature of a larger size for each additional stamina die expended.
If the target is Large, you can occupy any space that it left. You cannot use this maneuver if you or the target would end up sharing the same space as another creature or terrain such as a wall.