Acid Cloud (Augmancy: Acid Splash)

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

As part of the casting of this spell, you cast acid splash. Instead of the normal effect, you create a cloud of acid that rains down on a 15-foot-radius cylinder within range. The cloud spreads around corners, and it lasts for the duration or until a strong wind disperses the cloud, ending the spell. When a creature enters the spell's area for the first time on a turn or starts its turn there, it must succeed on a Dexterity saving throw or take damage from the acid splash spell. On a successful save, the target takes half 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.