You are as smart as Boo; You gain the following benefits.

• Go For The Eyes. When you take the Attack action on your turn, you can replace one of your attacks to target a creature within 5 feet of one of your allies; the target receives the Blinded condition until the end of your turn.
• Sword, Meet Evil. When you hit a Blinded creature with a weapon attack, you can cause the weapon to deal extra damage to the target equal to your Proficiency Bonus.