Skilful Blade Master

You've mastered the art of one-handed weapons, allowing you to bolster your powerful strikes. You gain the following benefits:

• On your turn, when reduce a creature to 0 hit points with an attack with a one-handed weapon, you can make one bonus melee weapon attack as an extra attack during your action.

• If you are wielding a longsword or warhammer and you score a critical hit, your melee attacks with those weapons deal an extra 1d8 damage.

• Before you make a melee attack with a one-handed 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.