Master of The Fist

You have learned that your fists can deal as great of damage to any foe as if your hands were heavy weighted weapons. Strike with the force of a great typhoon and receive these benefits:

• On your turn, when you score a critical hit with an unarmed strike or reduce a creature to 0 hit points with one, you can make an additional unarmed strike attack as a bonus action.
• Before you make an unarmed strike attack, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage.