Earthen Mastery

You gain complete control of the earth around you, and manipulate it in any way you see fit. When you cast this spell and on each of your turns as a bonus action, you can move and shape up to 50 feet of dirt or stone and move it into any unoccupied space you can see within range. Each 10 foot section of stone has an AC of 14 and 25 hitpoints.

As an action, you can fire a piece of stone about 20 feet in size toward a point you can see within range. Every creature within 10 feet of that point must make a Dexterity saving throw, taking 4d10 bludgeoning damage on a failed save, or half as much on a successful one. A creature who fails this save is also knocked prone.