Ash Cloud

A swirling cloud of smoke shot through with white-hot embers appears in a 20-foot-radius sphere centered on a point within range. The cloud spreads around corners and is heavily obscured. The cloud moves 10 feet directly away from you in a direction that you choose at the start of each of your turns. 

Each creature within the 20-foot-radius sphere must make a Dexterity saving throw. A target takes 3d8 fire damage and 2d6 poison damage on a failed save, or half as much damage on a successful one.

Creatures that don't need to breathe or are immune to poison automatically are immune to the poison damage.

A moderate wind (at least 10 miles per hour) disperses the cloud after 2 rounds. A strong wind (at least 20 miles per hour) disperses it after 1 round.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 fire damage and 1d6 poison damage for each slot level above 2nd.