Esrom's Shadow Sphere

A small ball of shadow appears at a point you choose within range then expands to consume the area with darkness from the Shadowfell. Each creature in a 20-foot radius must make a Dexterity saving throw. A target takes 8d6 psychic damage on a failed save, or half as much damage on a successful one. The shadow spreads around corners. The area is in darkness until the start of your next turn.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.