One-Hand Melee Master

You have honed your skills of single weaponry, improving the skill, and making sure you always have a hand free. You gain the following benefits:

• On your turn, when you score a critical hit with a melee weapon or reduce a creature to 0 hit points with one, you can add your level plus your proficiency to your HP.
• Before you make a melee attack with a one-handed melee 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.