Earworm

You call upon the power of pop music to dismay and distract your enemies. All creatures within a 15 foot emanation take 2d6 psychic damage and must make a Wisdom saving throw. On a failed save, the creature takes 1d6 psychic damage at the start of each turn, and has disadvantage on attack rolls against creatures other than you. An affected creature can make a Wisdom saving throw at the end of its turns, ending the effect on a successful save.

Using a Higher-Level Spell Slot. The damage (both initial and later) increases by 1d6 for each spell slot level above 2.