Acidic Burst

You create a acidic orb and fling it at one creature within range. Make a ranged spell attack against the target. On a hit, the target takes 2d4 acid damage and is covered in a small amount of acid until the start of your next turn. If the target doesn't move 5 feet or more before then, the target takes 1d4 acid damage, and the spell ends.

At Higher Levels. The attack's damage increases by 2d4 when you reach 5th level (4d4), 11th level (6d4), and 17th level (8d4). and the damage the target takes for moving increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).