Hydaelyn

This spell creates a sphere centered on a point you choose within range, filling it with magical darkness and crushing gravitational force. The area is difficult terrain, and creatures within are blinded, deafened, immune to thunder damage, and unable to cast spells with verbal components and thier movement is cut by half. Any creature entering or starting its turn in the sphere must make a Constitution saving throw, taking 8d10 force damage on a failure, or half on a success. Creatures reduced to 0 hit points by this damage are disintegrated, leaving only a pile of fine gray dust.