Churn Earth

You cause the earth to churn and roil like a rock grinder. Until the spell ends, the churning earth fills a 5-foot cube. Any creature in the space when you cast the spell must succeed on a Dexterity saving throw or take 1d8 nonmagical bludgeoning damage. A creature must also make the saving throw when it moves into the space for the first time on a turn or ends its turn there. A creature that is prone or burrowing has disadvantage on the save.

The spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).