Prerequisite: Fighting Style: Unarmed Fighting or Martial Arts
Your experience fighting unarmed has taught you to ignore pain for the sake of landing as many strikes as possible.
Sturdier Frame. Increase your hp by your current proficiency bonus * 10
Adrenaline Rush. Over the course of your pugilistic career, you gain new ways to shrug off and deal more damage. Starting with a d4 at character level 1-4, once per turn, deal an additional damage type matching your unarmed strike. The attacker gains temporary hit points equal to half the dealt damage, minimum (1).
The dice increases as the character grows; Levels 5-8 (1d6), 9-12 (1d8), 13-16 (1d10), 17-20(1d12)