Meteor Strike

You've learned to put the weight of your body into your punches to gain an advantage, letting your momentum empower your strikes

• Before you make a melee attack with an unarmed strike you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage.
• On your turn, if you score a critical hit on an enemy with an unarmed strike while using this feature you must make a dc 18 con save, on a failure taking half the damage you dealt any enemy. On a pass taking no damage.