Path of the Pyromancer

Barbarians who draw on the power of these gods can use their power to burn their enemies. In order to cement ties to their gods, barbarians who follow this path usually burn themselves on purpose in honor of their gods’. These burn marks represent the barbarian's understanding of the power of they are capable of wielding.

Ancestral Fire

Starting when you choose this path at 3rd level, you seem to catch fire as the burning hatred of ancient gods burns inside you. Whenever you hit a creature while raging, they take fire damage equal to your Constitution modifier.

Burning Hatred

Beginning at 6th level, you harness the burning rage within you. If you are raging, you can use an action to throw a mote of fire which explodes and leaves lava lingering on the ground.

Choose a spot within 60 feet of you that you can see. The sphere explodes in a 10 feet radius, dealing 2d6 fire damage to each creature in it. It also leaves behind a pool of molten rock which deals an additional 2d6 damage when a creature enters the area for the first time on a turn or starts its turn there. The pool fades after 1 minute or until you use this feature again.

This damage increases when you reach certain levels in this class: 4d6 at 10th level and 6d6 at 14th level.

Firestorm

At 10th level, you gain the ability to conjure several pillars of flame whilst raging. While raging, you can as an action choose an amount of 1d4 + Your CON modifier 5 feet areas within 60 feet of you that you can see. 20 ft tall pillars of flame strike from those locations. 

A creature in the space of a flame pillar must succeed on a Dexterity Saving Throw or suffer 8d6 fire damage. The DC equals 8 + Your CON modifier + Your Proficiency bonus. On a successful save they take half damage.

After you use this feature, you can't use it until you finish a long rest.

Great Black Combustion

At 14th level, your burning spirit grows powerful enough to mimic that of a dragons fiery breath. In addition, you gain immunity to fire damage.

As an action whist raging, you can spew forth a long line of black, everburning fire. All enemies within a 15 feet wide and 60 feet long line must succeed on a Dexterity Saving throw or take 10d10 fire damage. The DC equals 8 + Your CON modifier + Your Proficiency bonus. On a successful save, they take half damage from this effect. You are stunned until the beginning of your next turn when you use this feature.

You can use this feature a number of times equal your Constitution modifier. When you finish a long rest, you regain all expended uses.