Path of the Sun

When entering a rage you harness the sun's energy for your own. You become a vessel of the sun's power and allow it to flow freely throughout your body. Each of your strikes contains the sun's great heat. Your body has naturally adapted in order to withstand this power too. Your power is at its peak at noon.

Sunshine

Starting when you choose this path at 3rd level, your body begins to draw power from the sun. It begins to transform and shape itself into its prime. You gain temporary hit points equal to your Barbarian level times 2. Additionally, you emit a 10ft aura of light from your body. All other creatures who start their turn in this aura are dealt 1d6 fire/radiant damage. Additionally, you can not rage at night. 

Brilliant Light

Beginning at 6th level, you become resistant to radiant and fire damage. Additionally, you may take 2d6 psychic damage and extent your aura by 5ft. You may do this once per short or long rest. 

Sunburst

Beginning at 10th level, you can replace one of your attacks to release a short yet powerful burst of sunlight within a 60ft radius. This counts as a ranged attack roll that uses your Strength and proficiency bonus dealing a total of 2d6 fire/radiant damage + your Strength modifier. 

The Sun's Chosen

Starting at 14th level, when you enter a rage and the sun is at its highest point you may use this ability. You gain the following effects.

• The effects of the Enlarge/Reduce spell (Only the Enlarge effect).
• Your Strength and Constitution scores go up by 2. This can exceed 20 but not 26. 
• You gain one additional extra attack. 
• You gain resistance to all damage.

When your rage ends, you gain 2 levels of exhaustion and are automatically incapacitated for 1d4 days. While incapacitated your levels of exhaustion do not lower.