Deadly Precision

Prerequisite: Dexterity 13 or higher

Increase your Dexterity by 1, to a maximum of 20.

Before you make an attack with a finesse weapon you are proficient with, you can choose to take a penalty to the attack roll equal to your Proficiency Bonus. If the attack hits, the attack deals extra damage equal to twice your Proficiency Bonus.

You can use this benefit only once per turn.