Acid Rain

You choose a spot up to 120ft away, and summon a 20ft radius dark cloud 30ft above the enemy. A heavy shower of Acid droplets rains directly below in a cylinder.  A creature caught in the shower must make a dexterity saving throw, on a fail takes 8d6 Acid damage, or half as much on a success. A roof between the cloud and target can block the rain.

When cast at a higher level, the damage increases by 1d6.