Acid Rain

A rain of  acid droplets pounds to the ground in a 20-foot-radius, 40-foot-high cylinder centered on a point within range. Each creature in the cylinder must make a Dexterity saving throw. A creature takes 6d6 acid damage on a failed save, or half as much damage on a successful one.

the rain turn the area of effect becomes lightly obscured until the end of your next turn.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the acid damage increases by 2d6 for each slot level above 4th.