You create a 20-foot-radius sphere of undead, ravenous carrion crows centered on a point you choose within range, which last for the duraon of the spell. The flock spreads around corners, and its area is lightly obscured.   When a creature enters the spell's area for the first me on a turn or starts its turn there, that creature must make a Dexterity saving throw. The creature takes 2d8 necroc damage and 2d8 piercing damage on a failed save, or half as much damage on a successful one.   At the start of each of your turns, you can move the flock up to 10 feet in any direcon (no acon required).