Unstoppable Moon

9th-Level Conjuration

Casting Time: 1 action
Range: 120 feet
Components: V, S, M (a stone carving of a moon and a pat of butter)
Duration: Concentration, up to 1 minute

You create a 15-foot-diameter sphere of moonrock that slams down in an unoccupied space you can see within range and lasts for the duration. Each creature within 10 feet of that space when you first create the sphere must make a Dexterity saving throw. On a failed save, a creature takes 5d10 bludgeoning damage and 5d10 radiant damage and is knocked prone. On a successful save, a creature takes half the damage and isn’t knocked prone.

As a bonus action, you can move the sphere up to 30 feet. If you ram the sphere into a creature, that creature must make a Dexterity saving throw. On a failed save, the creature takes 2d10 bludgeoning damage and 2d10 radiant damage and is knocked prone. On a successful save, the creature takes half the damage and isn’t knocked prone. The sphere stops moving only if you ram it into a Huge or larger creature, but a creature can be affected by the sphere only once on each of your turns, regardless of how many times you roll the sphere into it.

When you move the sphere, you can direct it to roll over barriers up to 10 feet tall and jump it across pits up to 20 feet wide.