Corrosion

You launch a harmless orb made out of acid at your target which bounces, thus making the attack DC lower. When it is near a creature or on the creature, 9 bolts of acid rice from the ground, that deal 1d4 acid damage for each bolt. Then it comes back down again dealing 1d8 acid damage for each bolt. The creature may take a Dexterity saving throw for each bolt, if succeeded they take no damage from that bolt.