Bounding Boulder

You summon a 3-foot diameter boulder that travels 90 feet in a straight line of your choosing. The boulder stops and vanishes after impacting an object or creature or reaching the extent of the range. If a creature is in the boulder's path, they must make a Dexterity saving throw to avoid the impact or take 1d8 bludgeoning damage. If the struck creature is of medium or smaller size they must make a Strength saving throw or be knocked prone.

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