Balgeiros' Sling

Choose one object weighing 1 to 5 pounds within range that isn’t being worn or carried. The object flies in a straight line up to 60 feet in a direction you choose before falling to the ground, stopping early if it impacts against a solid surface. If the object would strike a creature, that creature must make a Dexterity saving throw. On a failed save, the object strikes the target and stops moving. When the object strikes something, the object and what it strikes each take 1d8 bludgeoning damage.

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