Corrupt Shadow Mist

Shadowy tendrils of lust and despair erupt from a surface within range to fill a 30 foot cube within range. All creatures other than you must make a Constitution saving throw or take 3d6 necrotic damage. You recover an amount of hit points equal to half the damage you deal with this spell.

At Higher Levels. When you cast a spell using a 3rd level spell slot or higher, the spell's damage increases by 1d6 for every slot level above 2nd.