This Is The Song That Never Ends

"This is the song that NEVER ends.

Yes, it goes on and on, my friends.

Some people started singing it

Not knowing what it was,

And they’ll continue singing it

Forever, just because..."

You spin the string around your fingers and as you keep your eyes on your target they begin singing the song with a repeating verse. They roll a wisdom saving throw against your spell save DC. On a fail the target has disadvantage on concentration spells and cannot cast spells that require a verbal component. They take 1d8 psychic damage each turn till the spell is saved against. On a success the target takes half damage and nothing else happens. At the end of each of their turns they can roll to break free of the spell.

At higher levels, the song is contagious as most earworms are and two other targets of your choice within 50 ft of your target roll wisdom save to avoid coming under the influence of the spell. 6th, 7th, 8th and so forth. 

At every level above 3rd you add a d8 to damage, 4th 2d8, 5th 3d8, 6th 4d8 and so forth.