The Magnificence of Bim (Blindness/Deafness)

One creature that you can see within range must succeed on a Wisdom saving throw, or it either hears the most beatyfull melody or sees the most fatasical vision. As a result it has the ]Blinded[ or Deafened condition (your choice) for the duration. At the end of each of its turns, the target repeats the save, ending the spell on itself on a success.

Using a Higher-Level Spell Slot. You can target one additional creature for each spell slot level above 2.