Path of the Burning Star

When a barbarian following the Path of the Burning Star gets mad, they start to steam. Inside of them, created by the sheer pressure of their passion, is a small star. It shoots light and heat through them, empowering them even as their skin cracks and reveals the flames beneath.

Cruicble of Rage

Starting when you choose this path at 3rd level, when you enter a rage and at the beginning of your turns while in a rage, you can choose to have your hit points reduced by an amount equal to your Constitution modifier. In exchange, you gain temporary hit points equal to double your barbarian level, which lasts as long as your rage. For as long as you have the temporary health granted by this feature, any enemy that ends its turn within 20 feet of you takes fire damage equal to your rage damage + your Charisma modifier.

Expanding Star

At 6th level, you can cast the spell Enlarge/Reduce on yourself without using a spell slot and without components. Doing so doesn't require concentration from you, and the spell ends after its full duration or after you dismiss it. You can make use of this feature once per long rest.

Blinding Burning

Beginning at 10th level, whenever you are under the effects of one of the features given to you by this primal path, you shed bright light for 20 feet around you, and dim light for 20 feet further. Enemies within the bright light have disadvantage when attacking you unless they are immune to the blinded condition. Additionally, enemies that end their turn within 5 feet of you must succeed on a Constitution saving throw with a DC equal to 10 + your proficiency bonus + your Charisma modifier or be blinded until the end of their next turn.

Supernova

The star within you collapses as your rages come to an end, causing energy to rush out of your body.  At 14th level, whenever you finish a rage that has lasted at least 1 minute, you can cause fire to rush out of your body. When you do so every creature aside from you within 20 feet of you must make a Dexterity saving throw with a DC equal to 10 + your proficiency bonus + your Charisma modifier. They take 8d6 fire damage on a failed save, and half as much on a successful save. The fire spreads around corners and ignites flammable objects in the area that aren't being worn or carried.