Call of the Crow Mother

A swarm made up of flocks of screaming crows appears in a location you choose within range. The area of the swarm consists of up to ten 10-foot cubes, which you can arrange as you wish. Each cube must have at least one face adjacent to the face of another cube. Each creature in the area must make a Dexterity saving throw. It takes 7d10 piercing damage on a failed save, or half as much damage on a successful one.

The area is Heavily Obscured and Difficult Terrain until the start of the caster's next turn.