Summoning all of the energy of the cosmos, you unleash upon your enemies the most devastating spell imaginable. All creatures in the line of sight must make a CON save against a DC 18. On a hit, the energy is released in a 100ft line, the blast deals 10d10 Fire damage, 20d12 Radiant damage, and 10d6 force damage.

To cast, the caster must sacrifice half of their current Hit Points. Once casted, the caster receives one point of exhaustion and has the Immobile status effect for two turns. During which time, the caster cannot cast any spells or cantrips and cannot move at all.

To cast at maximum damage, the caster must sacrifice 3/4 of their current Hit Points and spend an entire round (passing their Action and Bonus Action) to charge the spell completely. Once cast, the caster receives two points of exhaustion and has the Immobile status effect for two turns. During which time, the caster cannot cast any spells or cantrips and cannot move at all.