Path of Burning Fury

Burning Fury barbarians have so fully embraced their rage that they have become a living inferno the rage inside you so hot that it can burn your foes to ash. The heat of their hate can shield them from flames, and enemies are punished for attacking them with burning retribution.

Fiery Anger

Starting at 3rd level, your passion and rage, like a burning fire within has reached the surface.

As a result, once per turn you can add 1d4 fire damage to a single melee attack while you are raging.
The damage die increases to 1d6 at 10th level, and to 1d8 at 14th level.

Boiling Spirit

At 6th level the fire within you burns bright, even brighter than the fire without.

You gain resistance to fire damage, and you don’t suffer the effects of extreme heat or extreme cold, as described in the Dungeon Master’s Guide. 

At 10th level you gain immunity to fire damage.

 

Red-Hot Retribution

At 10th level, the flames of your hate have grown strong, strong enough even to punish enemies.

Once per rage, you can cast hellish rebuke at 1st level the save DC equals 8 + your proficiency bonus + your Constitution modifier.

 

Furious Inferno

At 14th level the pure untamed blaze within your being has become so hot that it scorches all, consuming everything in its wake even other flames.

Once per turn when you hit a creature with an attack you can cause it to make a constitution saving throw,  or become vulnerable to fire damage, until your next turn. This also negates any resistance or immunity to fire damage.

Any creature killed by fire damage that you produce burns away leaving nothing but a fine pile of soot.