Finesse Weapon Master

You have learned how to utilize your precision and agility to perform lethal strikes on top of your advanced swordplay. You gain the following benefits:

• You are capable of parrying blows with swift movements of your blade to not only protect yourself, but others around you. When a creature makes an attack against you, you may use your reaction to add half your proficiency bonus (rounded up: minimum; 1) to your AC until the start of your next turn, potentially causing it to miss. If an ally creature within your melee range from you is targeted with an attack, you may use your reaction to add half your proficiency bonus (rounded up: minimum; 1) to their AC until the start of their next turn, potentially causing that enemy's attack to miss.

• Before you make an 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.