Swing and a missile

You take advantage of the momentary distraction an ally’s attack provides, firing a miniature arcane missile at your ally’s target just as the ally’s attack misses. Make a ranged spell attack against your ally’s target. On a hit, the target takes 1d4 force damage.

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