Light Weapon Master

You've learned to wield light melee weapons to your advantage, letting their swiftness empower your strikes. You gain the following benefits:

• On your turn, when you score a critical hit with a light melee weapon or if you reduce a creature to 0 hit points with one, you gain advantage on your next attack with that weapon before the end of your next turn.

• Before you make a melee attack with a light melee weapon that you are proficient and which normally deals 1D6 damage, you can choose to take a -3 penalty to the attack roll. If the attack hits, you add +6 to the attack's damage.

or

• Before you make a melee attack with a light melee weapon that you are proficient and which normally deals 1D4 damage, you can choose to take a -2 penalty to the attack roll. If the attack hits, you add +4 to the attack's damage.