You cause the earth to tumble and churn until massive slabs of stone crash out of the ground and slam together in a 20-foot cube centered on a point on the ground within range that you choose. Each creature in the area must make a Constitution saving throw. Flying creatures and Gargantuan creatures have advantage on this saving throw, and burrowing creatures have disadvantage on it.

On a failed saving throw, a creature takes 4d10 nonmagical bludgeoning damage, is stunned until the start of your next turn, and is knocked prone. On a successful saving throw, a creature takes half damage and suffers no other effects.

After casting the spell, the ground within the area becomes difficult terrain until cleared. Each 5-foot-square portion of the area requires at least 1 minute to clear by hand.