Dark poisonball

A bright streak flashes from your rod, staff or wand to a point you choose within range and then blossoms with a loud roar into an explosion of darkness. Each creature in a 40-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 22 (4d10) poison damage and 11 (2d10) necromatic on a failed save, or half as much damage on a successful one.

The darkness spreads around corners with a speed of 20 miles per hour. It destroys all objects in the area that aren't being worn or carried.