The Path of Blood Fire

Some races carry the fire in their blood.  Genasi, dragonborn, kobold even tiefling barbarians can call upon this blood to fuel their rage.

Flames of Conflict

Starting when you choose this path at 3rd level, you can channel your inner fire when you rage. If you do so, for the duration of your rage you can add 1d6 (1d8 at Level 6) fire damage.

Flames of the Storm

At 6th Level when this effect is activated , all other creatures in your aura take 3 fire damage each, increasing to 4 at 10th level, 5 at 15th level and 6 at 20th level.

Flames of Protection

Beginning at 10th level, you can use your inner fire to protect others.  Each creature of your choice has fire resistance whilst within your aura (10 feet).

Flames of Retaliation

Starting at 14th level, immediately after a creature in your aura hits you with an attack, you can use your reaction to force that creature to make a Dexterity saving throw (DC = 8+proficiency bonus + your Constitution bonus.  On a failed save, the creature takes 2d6 fire damage.