Knockout Master

You are practiced in hitting your target on a vital spot to cause them to fall unconscious, granting you the following benefits:

• Increase your Strength score by 1, to a maximum of 20.
• When you score a critical hit against a creature of your size or smaller with a melee attack that deals bludgeoning damage, you can force the target to make a Constitution saving throw (DC equals 8 + proficiency bonus + your Strength modifier). On a failed save, the target becomes prone and unconscious for 1d6 rounds.