Base Class: Barbarian
The drunkards, criminals, and heavy hitters of anyone all Bruisers have one thing in common, their everlasting confidence in their pure raw power.
Bruiser Rage
Starting when you choose this path at 3rd level, Whenever you rage your unarmed strikes use a d8 + Strength modifier for the damage instead of the normal 1 + Strength modifier, whenever you make an unarmed strike while raging you can use your bonus action to make an unarmed strike. When you recklessly attack with an unarmed strike you can choose to take bludgeoning damage equal to the extra rage damage, when you do you do an additional damage die.
Sly
Starting at 6th level, you can add your extra rage damage to your AC while raging. When you move at most half your movement you don't provoke opportunity attacks. When you move at most half your movement on your turn you gain temporary hit points equal to 2 × your constitution modifier, until the end of your next turn
Adrenaline Rush
Starting at 10th level, while raging you gain temporary hit points equal to 2 × your level at the end of your turn if you are below half your max health.
Final Stand
Starting at 14th level, while raging if you are reduced to 0 hit points but not outright killed you can take 4 turns immediately before going unconscious. If you use the Relentless Rage feature after using this you make the saving throw with a -5 to the roll.
You can only use this once you must finish a long rest to do so again.