Roaring Winds Of Limbo

8th-level conjuration (chaos)

Casting Time: 1 action
Range: 150 feet
Components: V, S
Duration: Concentration, up to 1 minute

You tear open a breach to the planes of chaos, and the act of doing so fills an area with a dangerous windstorm.

The area consists of twelve 10-foot cubes, which you can arrange as you wish. Each cube must have at least one face in common with a face of another cube. Each creature in the area is deafened, and any sound it makes cannot be heard outside the area. The wind disperses all gases and vapors and extinguishes all unprotected flames in the area, and has a 75 percent chance of extinguishing protected flames, such as lanterns. All Wisdom (Perception) checks that rely on sight made by a creature in the area have disadvantage due to the dust, grit, and debris being cast about.

Each creature in the area must make a Strength saving throw at the start of its turn. On a failed save, the creature is pushed 15 feet in a random direction. (Roll a d8, designating 1 as north, 2 as northeast, 3 as east, and so on around the points of the compass.) The wind also hampers movement; a creature in the area must spend 2 feet of movement for every 1 foot it moves.

As a bonus action on each of your turns, you can bombard up to twelve creatures in the area with flying debris, dealing 2d10 bludgeoning, 2d10 piercing, and 2d10 slashing damage. A creature that makes a successful Dexterity saving throw takes half the damage.