Black Fist Style
Similar to how the "Black Leg Style" utilizes kicks, this style is used by those who primarily use their fists as weapons. Many who utilize this style are often feared for their display of otherworldly strength, speed, defense, and use of Haki in battle. The spirit of those who use this style is often heroic, with a hint of bloodlust. Black fist style is named after the way its users coat their limbs in extremely dark and thick layers of haki.
Bonus Proficiency
You have trained to unlock the upper limits of your strength. You gain proficiency with the Athletics Skill. If you are already proficient, you gain proficiency in the Acrobatics or Insight skill instead.
Demon Stance
Also at the 3rd level, you develop a demonic bloodthirst, granting you power as you rip apart your enemies. When you reduce a creature within 5 feet of you to 0 hit points, you gain temporary hit points equal to your Constitution modifier + your Bruiser level (minimum of 1 temporary hit point).
Haki-Coated
At the 6th level, you may unlock any one "Uncommon" Color of Armament Haki Advancement advancement. If you have already taken all the uncommon armament haki advancement, you may take an uncommon haki advancement feat under a different color of haki, assuming you meet the prerequisites.
Bone Crusher
At the 11th level, you can perform a variety of combat maneuvers while you are grappling an opponent within 5 feet of you:
You can perform a mighty headbutt on a creature you are grappling with. If you deal damage with an unarmed strike against a creature you are grappling with, their attacks will have a disadvantage until the start of your next turn. You can only use this once per turn.
You can perform a backbreaker on a creature you are grappling with. If you deal damage with an unarmed strike against a creature you are grappling with, you can spend 1 fury point to attempt to stun them. The target must succeed on a Constitution saving throw or be Stunned until the end of your next turn. You can only use this once per turn.
When you take the attack action, you may spend 1 or more fury points to perform a suplex on a creature your size or larger you are grappling. They must make a Constitution saving throw against your Fury Save DC. On a failed save, the target takes the number of fury points spent + 3 scrapper die in bludgeoning damage and is knocked prone, or only takes half as much damage on a successful one. After this effect is used, the grapple ends.
At the 17th level, you may unlock any one "Very Rare" or lower Color of Armament Haki Advancement. If you have already taken all the very rare and lower armament haki advancements, you may take a very rare or lower haki advancement under a different color of haki, assuming you meet the prerequisites.