Orbital Stones

You lift three small to medium rocks or similar objects from within 10 feet of you, causing them to defy gravity and slowly circle you. While all three are in orbit, you have total cover against ranged attacks. While two are in orbit, you have three quarters cover, and while only one remains, you have half cover. The spell ends when none are orbiting you.

As a bonus action while at least one object remains, in orbit, you can magically fling it at a target in within 60 ft. Make a ranged spell attack roll. On hit, the target takes  2d12 bludgeoning damage and is knocked backward 5 feet.

I didn't write this, search google and should be able to find the original Reddit post r/UnearthedArcana