Acid Squall

As you begin to cast this spell, a rampart rainfall of acid begins to fall down on 20 foot cube area within range. 

Each creature within the cube must make a Dexterity saving throw or take 5d12 acid damage on a failed save, and half as much on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, the damage increases by 1d12 for each slot level above 6th