Earthbound Heaven

You conjure a tremendous boulder from the elemental plane of earth, which appears 300 feet above the ground in a place you choose. Each creature in a 100 foot radius under the boulder must make a Dexterity saving throw or suffer 12d12 bludgeoning damage and be knocked prone. On a failed save, they take half damage. Buildings and other structures automatically fail the saving throw and take maximum damage from this spell.

The boulder disappears immediately after making contact, leaving an appropriately sized crater behind.