Acid Rain

Duration: 1 minute, Concentration
You unleash a storm of swirling acid in a cylinder
20 ft wide and 30 ft high. The area is heavily
obscured. A creature that starts its turn in the
area or that enters it makes a Dex save, taking
6d6 acid damage on a failure or half as much on
a success. Once a creature leaves the area, it takes
half damage from the acid, as if it had succeeded
the save, at the beginning of it's next turn.
At Higher Levels. Each extra spell slot increases
the damag