Conjure a blast of cursed sand to hex your foes. One creature you can see within range must succeed a Constitution saving throw. On a failed save, the target takes 2d6 Necrotic damage and becomes Blinded for the spell's duration. While a creature is Blinded by this spell, it cannot regain hit points. On a successful save, the target takes half damage and avoids being Blinded

At the beginning of each of its turns, the target takes 1d6 Necrotic damage. Then the target may repeat the Constitution saving throw, ending the spell on a successful save.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the initial damage increases by 1d6 for each slot level above 3rd.