As an action, you can make a melee weapon attack with a weapon that deals bludgeoning damage in an attempt to knock the creature out. Add one stamina die to the attack’s damage (add half if you miss by 4 or less). The creature must succeed on a Fortitude saving throw or it is incapacitated for the duration.
A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
You can increase the damage for each additional stamina die expended.