Spell: Acid Arrow

You conjure an arrow of acid that keeps corroding the target after it hits. Make a spell attack against the target. On a hit, you deal 3d8 acid damage plus floor(@item.rank/2))d6 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.