Prerequisites: Strength of 15
In place of an attack, you can expend Maneuver Dice (up to your Proficiency Bonus) and strike the ground, forcing all targets in an adjacent 20-foot cube to make a Strength saving throw. On a failure, targets take bludgeoning damage equal to twice your Maneuver Die for each Maneuver Die spent + your Strength modifier and fall prone. On a success, they take half as much damage and do not fall prone. Objects within this area take the maximum amount of damage.
The area becomes difficult terrain. A creature can spend 1 minute to clear one 5-foot square of this difficult terrain.