Deathsmoke (Wind)

You cause a cloud of noxious black smoke to fill a 5-foot cube that obscures anything in or beyond the cloud. Any creature that is in the cube or moves through the cloud must make a Constitution saving throw. Those who fail take 1d6 necrotic damage.

The cloud disperses at the beginning of your next turn or if it is exposed to a magical breeze.

The spell’s damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).