Air Bullet

You condense air into a small sphere and fire it at a creature. Make a ranged spell attack against the target. On a hit, the target takes 1d4 + your spellcasting modifier bludgeoning damage and must succeed on a Strength saving throw or be knocked prone. If a creature is Huge or larger, it does not need to make a saving throw.

This spell's damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).