Duos's Earworm

You subject enemies to mental distress by magically enhancing a song they dislike but can't get out of their head. Choose a point in range as the center of a 10 ft radius sphere. Each creature in the area of effect on the turn when you cast the spell must make a Intelligence saving throw. On a failed save, a creature takes 2d8 psychic damage, and its speed is halved until the end of its next turn. On a successful save, a creature takes half as much damage and suffers no reduction to its speed.

Creatures targeted that have an Intelligence score of 4 or less suffer no effect from this spell. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d8 for each slot level above 1st.