Terrifying Bully

You bully and harass your foes, playing yourself up as undefeatable. You gain the following benefits.

Ability Score Increase. Increase your Strength, Dexterity, Constitution, or Charisma score by 1, to a maximum of 20.

Bully. When you score a Critical Hit against a creature with a melee attack or a creature makes a melee attack against you and rolls a natural 1, that creature must make a Wisdom saving throw (DC 8 plus your Proficiency Bonus and the modifier of the ability increased by this feat). On a failed save, the creature has the Frightened condition for 3 rounds. At the end of each of the Frightened creature’s turns, the creature repeats the save, ending the effect on itself on a success.