Corrosive Spittle

You launch a ball of viscous, corrosive liquid at one target within range. Make a ranged spell attack against the target. On a hit the target takes 1d6 acid damage. If the creature doesn’t move at least 5ft before the end of its next turn, it takes this damage again.

This spell’s damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).