Venomous Surge

You conjure a thin, green mist in a 10-foot-radius sphere at a point you choose within range. This toxic mist remains in place for the duration, lightly obscuring the area and poisoning those who remain within.

When a creature other then you enters the area for the first time on a turn or starts its turn there, it must succeed on a Constitution saving throw or take 4d10 poison damage and become poisoned until the start of its next turn. A creature that succeeds on the saving throw is immune to the poison damage and the poisoned condition from this casting of Venomous Surge.

The mist clings to the ground, swirling in place, and disperses if exposed to a strong wind, such as from the Gust spell.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d10 for each slot level above 3rd.