Unbreakable Will

Your mind is the ultimate decider of any fight. It's up to you when you choose to fall, not them. Your Will is strong enough for you to keep standing against those that would make you kneel before them. 

• Twice per day, when your hit points go down to zero, you can make a final attack against the opponent that hurt you with a +2 modifier if they are within striking distance. If the attack hits, your hit points go back from 0 to 1. Must take a long rest to restore attempts.
• You have advantage against any attempts to invade your mind (being charmed, controlled, put to sleep, etc.) and can throw off the effects in half the time.
• You cannot be frightened.