Dance of Acid Blades

A swirling cyclone of spinning sickle like blades made of acidic fluid fills a 30 ft. cube rising up from a point on the ground you can see within range. The cube can shrink to fit the allowable space as necessary (ex: an interior room 20 ft. wide x 20 ft. long x 10 ft. tall would be completely filled in all directions), but does not expand in any direction larger than it's default dimensions, and does not damage walls that border the space.  For the duration, the acidic blades turn the area into difficult terrain.

When a creature enters the affected area for the first time on a turn, or starts its turn there, the creature must succeed on a Dexterity saving throw. On a failed save, a creature takes 4d6 Acid and 4d6 Slashing damage. On a successful save, a creature takes half the damage of each type.

At Higher Levels. When you cast this spell using a spell slot of 5th or higher, the damage increases by 1d6 for each slot level above 4th.