Desiccate

A streak of shadow bursts from your pointing finger to a point you choose within range and then erupts with a deep gasping sound into an explosion of wisping smoke. Each creature in a 20-foot-radius sphere centered on that point must make a Constitution saving throw. A target takes 3d12 necrotic damage and is blinded for one round on a failed save, or half as much damage on a successful one. The smoke spreads around corners.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d12 for each slot level above 3rd.