As an action, you can make a weapon attack in an attempt to menace the creature, foiling its attacks and punishing them for harming others. 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 Will saving throw or it is marked by you for the duration. While marked, you have advantage on opportunity attacks against the target and the target has disadvantage on any attack roll that doesn’t target you.
The effect ends if you are incapacitated, someone else marks the creature, you attack or damage any other creature, if you cast a spell or use a spell that targets a hostile creature other than the target, if a creature friendly to you damages the target or casts a harmful spell on it, or if you end your turn more than 5 meters away from the target.
You can increase the damage for each additional stamina die expended.