Shadow Word: Pain

3rd-level Necromancy
Casting Time: 1 action
Range: 90 feet
Components: VSM (duskbat wing, dried and ground into a fine powder)
Duration: 3 rounds

You utter a word of inconceivable darkness that clouds the target's mind with fear and suffering. The target takes 3d6 shadow damage and must make a Wisdom saving throw. On a failure, they are affected by the malign words, taking 3d6 shadow damage at the beginning of its next 3 turns. If the target fails the saving throw by 5 or more, it is also blinded for the duration of the spell.

At Higher Levels. When you cast this spell using as spell slot of 4th level or higher, the immediate and ongoing damage increase by 1d6 for each slot level above 3rd.

Source: Homebrew