Choking Cloud (Augmancy: Poison Spray)

Augmancy. To cast this spell, you must know how to cast poison spray. You do not need to learn or prepare this spells to cast it if you know poison spray and have an appropriate spell slot available.

Until this spell ends, when you cast poison spray you target a 15-foot cone with a cloud of choking gas that originates from yourself, instead of the normal effect. Each creature within the area must make a Constitution saving throw. On a failed save, a creature takes damage from the poison spray spell. On a successful save, the creature takes half as much damage.

At Higher Levels. When you cast this spell with a slot level of 7th level or higher, the duration of the spell becomes 1 minute with no concentration required.