With lethal precision, you are a master of delivering killing blows, and revel in the destruction of your enemies. You gain the following benefits:

• Increase one ability score of your choice by 1, to a maximum of 20.

• When you score a critical hit against a creature, or hit a prone creature with an attack roll, you deal extra force damage to it equal to twice your proficiency bonus.

• When you reduce a creature to 0 hit points, you can use your reaction to gain temporary hit points equal to twice that creature’s Challenge Rating or level (minimum of 1). You can use this reaction a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a short or long rest.