Bonesplitting Strike

4th-level / Stone Dragon

By focusinattackg your strength into a single, devastating attack, you smash an opponent to the core. His very health and endurance are left wrecked by your attack.   As part of this maneuver, you make a melee attack. If this attack hits, it deals additional damage equal to thrice the number of hit dice the target has. Additionally, the target can not regain any hit dice until the end of your next turn.