One-Handed Weapon Master

You've learned to press the advantage with your weapon, letting its maneuverability empower your strikes. You gain the following benefits:

• On your turn, when you make weapon attack at advantage with a melee weapon you are wielding with one hand, you can make one melee weapon attack as a bonus action.
• Before you make a melee attack with a weapon you are wilding with one hand 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.