As a bonus action when you hit a creature with a melee weapon attack that deals bludgeoning damage, you smash through armor and bone. The target must make a Fortitude saving throw.
On a failed save, add the stamina die to the attack’s damage roll and the attack’s damage ignores resistances.
You can increase the damage for each additional stamina die expended.
Elder Mountain Hammer. You can expend 2 additional stamina dice so damage immunities are treated as damage resistances (not ignored).