You've learned to spot the weak spots in a creature's defenses, capitalizing on their mistakes with your finesse weapon. You gain the following benefits:
- If they are made with a finesse weapon, your weapon attacks score a critical hit on a roll of 19 or 20.
- Before you make a melee attack with a finesse weapon that you are proficient with, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage.