Oruns Second Chance

In a moment where the bearer of this mark encounters the diety that caused them to break their oath to Orun, make a DC 25 constitution saving throw, on success harness the power of the sun itself and be granted the spells Solar Flare and Final Flash. On a failed save your body struggles containing the sheer amount of energy the sun holds and for 1d4 rounds you have the Radiant Body aura. on your next turn after the final round of the d4 result your body burns at a rapid rate and finaly explodes in a Supernova dealing 27d8 radiant dmg. Your body and soul become a 100ft radius galaxy of energy slowly floating to the heavens to form a new star for Orun to feed on for energy.

Solar Flare: as an action you bring your hands to the marking on your forehead palms facing the target and fingers stretched out, shouting Solar Flare, emitting a light brighter than the sun blinding all creatures that aren't protecting their eyes for 1d4 rounds. Creatures must make a DC 24 dex save or be blinded for 1d4 rounds. 

Final Flash: you stretch your arms out, hands open, and spend 1 turn channeling the immense power of Orun to your arms causing your arms to periodically shoot lightning in a random direction, creaturs entering within 10 ft radius of your location must make a dc 18 dex save or get hit by the lightning dealing 3d6 lightning dmg. On your next turn you spend an action closing your arms extended outwards with your hands bent at the wrist and shout final flash releasing a 60ft cone of radiant energy consuming all the energy granted to you dealing 20d8 radiant dmg and giving you 1 lvl exhaustion. Any creature in the cone must make a DC 22 dex save, on a failed save the creature takes 20d8 radiant dmg having severe burns and loses 1 limb(not the head) as its burnt to ash, on a success target takes the 20d8 radiant dmg having severe burns. 

Radiant Body Aura: in a 20 ft radius around your body,  radiating immense heat as you struggle containing the energy given to you. For 1d4 rounds any creature that enters the space within your aura must make a dc 20 constitution saving throw or take 4d6 radiant dmg, ranged attacks have no affect on you as anything entering your aura burns to ash, and mellee attacks have disadvantage as the weapon softens due to the heat.

Supernova: on your next turn after the final round of the d4 result for Radiant Body, your body burns at an astounding rate and finally exploding in a 50 ft sphere dealing 27d8 radiant dmg or instantly killing any creature within 15 ft of the center(being you). Creatures further than 15ft from the center must make a dc 27 constitution saving throw or lose a limb (not the head) due to the blast wave. Your body leaving behind a galaxy of energy at the blast sight that slowly rises to the heavens to slowly become a small star for Orun to use for power.