Path of the Brawler

Battered yet unyielding, that is what the bloody fist symbolizes. It has been used as a symbol of rebellion and open defiance. Brawler barbarians recognize that their greatest strength is themselves. These barbarians realize that greater than any greatsword or greataxe, any magic item or artifact. Is their fist. 

Battle-hardened Fist

Starting when you choose this path at 3rd level, your experience in tavern brawls and back ally fist fights has taught you to hit where it hurts. You gain proficiency in Unarmed attacks, additionally your unarmed attacks deal 1d6 damage and gain the Light and Finesse properties.

When you reach certain levels in this class the damage due of your unarmed attack increases, becoming a d8 at 6th level, a d10 at 10th level, and a d12 at 14th level. 

Blood-Stained Fist

Beginning at 6th level,  your fist has been soaked in enough blood to gain supernatural qualities. Your unarmed attacks now count as magical for the purposes of overcoming resistances and immunities, as well as gaining a +1 to attack and damage rolls. 

When you reach certain levels in this class, your fist gains further strength: gaining a +2 to attack and damage rolls at level 10 and a +3 attack to attack and damage rolls at level 14.

Devastating Fist

At 10th level, your experience delivering killer blows allows you to do it more consistently, your unarmed attacks now crit on a 19 and 20. 

Unbreaking Fist

At 14th level your fists leave no creature unharmed, no matter what they are. Your unarmed attacks now ignore resistance and immunities to damage. Additionally, you can strike your opponent where it truly hurts. Once per turn when you hit with an unarmed attack you may choose to take the maximum damage instead of rolling. You may do this a number of times equal to your proficiency bonus, with all uses refreshing on a Long Rest.