Path of the Firewalker

Barbarians who walk this path harness their rage into flames to incinerate their opponents, whether through righteous anger or the cold fury of revenge, these warriors burn the brightest and strongest.

Fiery Aura

Starting at 3rd level, you emanate a burning aura while you rage. The aura extends 10 feet from you in every direction, but not through total cover.

Whilst this aura is active you shed bright light for 20 feet and dim light for a further 20 feet, in addition any creature that ends its turn within your aura takes Fire damage equal to your barbarian level. Additionally whilst the aura is active you can use an action to set alight any object in your aura that isn't being worn or carried.
Starting at level 10 the damage a creature takes is equal to double your barbarian level.

Born of Flame

Starting at 6th level, your powers over fire have grown and learned to avoid the worst of its wrath, you gain resistance to fire damage.

In addition, whilst you are raging you may use a bonus action to wreathe your weapon in flame, as a bonus action you enflame a weapon you are proficient in that does not already deal fire/cold/poison/lightning/acid damage. An enflamed weapon deals an additional d8 of fire damage, this effect lasts for 1 minute, but ends if you are incapacitated or if you are submerged or doused with water. 

Unwavering Flame

Starting at 10th level, whilst your aura is active you are immune to fire damage, and whenever you take fire in damage you gain temporary hit points equal to half the fire damage inflicted to you.

Raging Sandstorm

While raging on your turn, you can call forth a blinding sandstorm as a bonus action. The sand extends to the limit of your aura, traveling with you and heavily obscuring the area. Any other creature that begins its turn in the sandstorm must succeed on a CON saving throw or be blinded until the end of its next turn. While you are in your sandstorm, you gain blindsight to the edge of your aura. The sandstorm rages for up to 1 minute. The sand extends around corners, and can be blown away by a heavy wind. You must finish a short or long rest before using this feature again.