When you hit a non-magical object with a melee weapon attack, you can expend an Exploit Die, add it to the damage, and that attack deals maximum damage in place of rolling.
Prerequisites: 9th-level, Strength of 15
In place of an attack, you can strike the ground and expend Exploit Dice (up to your Proficiency Bonus). You destroy an adjacent 20-foot cube, turning it into difficult terrain.
Creatures in that area must make a Strength saving throw. On a failure, creatures take bludgeoning damage equal to two Exploit Dice per each Exploit Die you spent, + your Strength modifier and fall Prone. On a success, they take half as much damage and do not fall Prone. Structures and objects in this area take the maximum possible damage as if they failed.