As an action, you can make a weapon attack in an attempt to disorient the creature. Add the stamina die to the attack’s damage (add half if you miss by 4 or less). On a hit, the creature must succeed on a Fortitude saving throw or it can’t take reactions 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.
Stagger. You can expend 1 additional stamina die so the creature is staggered instead of not being able to take reactions.
Stun. You can expend 4 additional stamina die so the creature is stunned instead of not being able to take reactions.