Alfred's psychedelic acid Rain

Rain of magical psychedelic acid drops 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 Constitution saving throw. A creature takes 2d8 psychic damage and 4d6 acid damage on a failed save, or half as much damage on a successful one.

Puddles of Acid turns the area into difficult terrain 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 psychic damage increases by 1d8 for each slot level above 4th.