Blood is power, pain is a mindset and death is a fate worth tempting. Years of training in a tradition almost forgotten, you have strengthened your body and spirit beyond mortal measures. In combat, strong willpower and calculated risk turns grievous wounds to your advantage. The closer you come to death's door, the higher your limits rise. 

Empowering Pain

You revel in pain. As your body takes damage, your need to share in the glory of anguish grows. Starting at 3rd level, for every 10 hit points you are missing, you can add 1d6 to the damage of each of your unarmed attacks. 

Fading Satisfaction

At the end of battle, the thrill that comes from the pain of your wounds fades, and the damage you sustained suddenly feels inconsequential. After a combat encounter ends, you can spend 10 minutes and 1 ki point to roll up to half your current total hit die (rounded up), and recover that many hit points. This feature does not consume your hit die that you use to regain hit points when you rest.You can use this feature an amount equal to your Wisdom modifier, and regain all uses of this feature after a long rest. 

Shared Torment

At 6th level, when a creature within 5 feet of you damages you in any way, you can share your pain. You can spend 1 ki point and your reaction, causing the creature to immediately take damage equal to half the damage you suffered. 

Fervent Lashing

Starting at 6th level, when you take the Attack action on your turn, you can first damage your own body, heightening your blood-lust. When you use this feature, you can spend 2 ki points to perform a ritualistic lashing. Start by taking damage equal to 1d8 + your monk level. This damage cannot be reduced in any way. Until the start of your next turn, you gain advantage on any attacks you make, and any attacks made against you have disadvantage. 

Pain Tolerance

Pain is not a foreign concept to you. Starting at 11th level, if you start your turn below half health you gain resistance to piercing, slashing and bludgeoning damage from non-magical attacks. 

Indomitable

Death must wait. When you drop to 0 hit points, you can immediately make a single attack on any enemy within 5 feet of you, interrupting the current turn. If this attack hits, you immediately regain hit points equal to the amount of damage you deal with the attack, potentially preventing you from falling unconscious.  You can use this feature once per short or long rest.