acid attack evocation 

Traditions arcane, primal

Cast [>>] somatic, verbal

Range 120 feet; Targets 1 creature

You conjure an arrow of acid that continues corroding the target after it hits. Make a spell attack against the target.

On a hit, you deal 3d8 acid damage plus 1d6 persistent acid damage. On a critical hit, double the initial damage, but not the persistent damage.

Heightened (+2) The initial damage increases by 2d8, and the persistent acid damage increases by 1d6.

Core Rulebook, page 316.