Primordial Explosion

Celestial (runomancy) 9th level

Casting Time: 1 bonus action
Range: 120 feet
Components: V, S
Duration: Instantaneous

You fire a sphere of pure energy at a creature you can see within range of the spell. It must make a Dexterity saving throw. On a failed save, the creature takes 15d10 + half the hit points it lost from gravitational damage.