1 minute/stamina die
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.
Enhance
You can augment this maneuver with the following options, expending stamina dice for each option.
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.