You create a 15 foot sphere of hot, choking ash centered on yourself. Each creature within that radius must succeed on a constitution saving throw. On a failed save, a target takes 2d8 poison damage and 4d8 fire damage, and is poisoned for 1 minute. The creature can repeat the save at the start of each of its turns, ending the effect on a success. On a failed save, a target takes half as much damage and is not poisoned.