Path of Combustion

Path of combustion barbarians channel their raw, unflinching rage into themselves to the point of giving off heat and explosive potential.

Level 3: Internal Combustion

When raging, you have resistance to fire damage.

Level 3: Smoking Retaliation

When you lash out recklessly at a target, your body begins to cinder and smoke. While reckless attack is active during a round, any time you are hit with a melee attack, the attacker takes fire damage equal to twice your rage damage bonus.

Level 6: Unleash the Inferno

Once per rage, you can spend an action to release built-up energy in one of two forms:

Combustion Fireball: You create a 20ft radius sphere around your character, and every creature within the radius (except your character) has to make a dexterity save or take 4d6 fire and 4d6 force damage and half as much on a success. DC 8 + proficiency bonus + constitution modifier.

Rays of Force: You send out 3 rays with a range of 60ft and make an attack roll for each using your weapon's attack modifier. Each ray deals 2d6 force damage. (This ability works with reckless attack)

Level 10: Feed the Fire

While your rage is active, as a bonus action on subsequent turns, you vent built-up thermal energy and siphon life from your foes. You release a 5ft emanation of pure heat and roll 2d8 fire damage. You gain temporary hit points equal to half that fire damage. Each creature of your choice within the emanation must make a dexterity saving throw (DC 8+Proficiency Bonus+Con Modifier). On a failure, a creature takes the full damage. On a success, the creature takes half damage. 

Level 14: Smokescreen

While raging, a 20ft cloud of dark smoke surrounds you, making the area heavily obscured to creatures you choose. You glow like a beacon through the smoke, and all creatures can see you perfectly, but they can not see any other creatures in the cloud.

Level 14: Overcharged Backlash

While raging, any time you are hit with a melee attack, the creature takes force damage back. Roll a number of d6s equal to your rage damage bonus to determine the damage. If reckless attack is active, you roll d8s instead of d6s. This feature overrides Smoking Retaliation while rage is active.