Path of the Pugilist

Barbarians of the Path of the Pugilist belong to tribes of brawlers who spend their lives dedicated to growing stronger. These barbarians believe in neither weapons nor armor and rely only on their bodies in combat. Their fiery spirit and sheer willpower allows them to harden their skin against weapons and hold steadfast against magic. Pugilist barbarians are taught that within the core of their soul is an ember which sustains their life force, and from a young age they hone their bodies to shield and protect this flame which in turn allows them to channel their flames into their attacks.

Will of Fire

Starting when you choose this path at 3rd level, your practice of martial arts gives you mastery of combat styles that use unarmed strikes. You can roll a d8 in place of the normal damage of your unarmed strike. When you use the Attack action with an unarmed strike on your turn, you can make one unarmed strike as a bonus action.

Additionally, when you enter your rage, you can move with such energy and force that your limbs can catch fire. Until the rage ends, heat gathers around your body, ready to burn away your enemies. When you make an attack you can add an extra 1d8 fire damage to the attack.

Explosive Movement

At 6th level, you can accelerate rapidly and jump great distances. Your movement speed increases by 10 feet, your jumping distance becomes equal to your movement speed, and you can also ignore difficult terrain.

Iron Skin

Also at 6th level, you learn to harden your skin beyond what any weapon can cut and stronger than any armor. While raging, you gain immunity to Bludgeoning, Piercing, and Slashing damage. While your body is hardened to this degree, the flames covering your limbs burn a bright blue, and you can use the flames to make a ranged attack roll against any creature within 30 feet of you. Additionally, even while not raging, you can ignite your hands with normal orange flames as a bonus action. 

Mystical Bulwark

Starting at 10th level, your willpower and belief in the strength of your body forms a protective aura around you. When you are hit by an attack or you fail a saving throw, you can use your reaction to gain a +2 bonus to your AC against that attack or a +4 bonus to that saving throw. Additionally, you halve any damage from the attack if it still hits after the bonus is applied.

Final Inferno

At 14th level, your inner fire burns brighter than ever. The flame which fuels your life force grants you additional hit points per level equal to your Constitution modifier. Additionally, when you enter a Rage your inner flames burn through your exterior searing everything nearby. Each creature within 10 feet of you at the start of each of your turns is forced to make a DC 16 Dexterity Saving Throw or take 2d8 fire damage.