Acid Fog

A 10-foot radius sphere of thin acidic fog appears at a point you can see within range. The fog spreads around corners. It lasts for the duration or until a wind of moderate or greater speed (at least 10 miles per hour) disperses it.

When a creature moves into the fog's area for the first time on a turn, or starts its turn there, it must make a Constitution saving throw. A creature takes 3d4 acid damage on a failed save, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increase by 1d4 and the sphere's radius increase by 10 feet for each slot level above 1st.