Executioner

You provide a quick end to downed creatures. You gain the following benefits:

• Increase your Strength, Dexterity, or Constitution score by 1, to a maximum of 20.
• When a creature within your reach is prone, you may use your reaction to make a melee attack against that creature, provided this melee attack does not have the reach property.
• If a creature is both prone and restrained, the creature is considered vulnerable to your attacks.
• Melee attacks you make against creatures that are prone score a critical hit on a roll of 19 or 20.