Add Leverage Feat (Combat)
You hold your weapon using an extra hand (or more) to better push your enemies around.
For each hand you use to wield your weapon beyond the minimum required to wield that weapon, you increase the distance you can move your opponent with a successful bull rush or reposition combat maneuver by 5 feet. If you use a trip combat maneuver against a flying opponent, you can increase the distance that creature descends by 5 feet for each additional hand used to wield your weapon. Changing your grip to alter the number of hands you are wielding a weapon with is a swift action. You can’t hold items in hands used to add leverage, or use them for any other purpose.