Cannon Ball

A cannonball appears, at full velocity and size, then travels from 5 feet in around the caster to the target. When the cannonball lands, each creature in a 10-foot-radius Sphere centered on that point makes a Dexterity saving throw. A creature takes Force damage equal to the total accumulated damage on a failed save or half as much damage on a successful one.

The spell’s base damage is 4d10

Using a Higher-Level Spell Slot. The base damage increases by 1d10 for each spell slot level above 3.