Mark of Chevalier

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

Looming Threat. You gain proficiency in the Intimidation skill. If you already have proficiency in it, you instead gain Expertise in that skill. Furthermore, you have Advantage on Charisma (Intimidation) checks directed at any creature that has harmed or explicitly threatened an ally within the last 24 hours.

Retaliation. When a creature you can see within your weapon's reach deals damage to an ally, you can use your Reaction to make one melee weapon attack against that creature. On a hit, the target takes extra damage equal to your Proficiency Bonus, and it is shaken by your ferocity; the target has Disadvantage on all attack rolls and ability checks until the end of its next turn. You can use this Reaction a number of times equal to your Proficiency Bonus, and you regain all expended uses when you finish a Long Rest.