Dave's Ear Worm

words are sang to a creature making them have to do a wisdom saving throw.  On a failed save a spectral worm is summoned in their mind causing 2 d4 psychic damage.  The person when every they cast a spell must make a dc 11 wisdom save that from the worm and on a failed save the casters verbal components are interrupted by a song of the casters choosing.  This spell had the psychic damage go up by one and the spell dc go up by one for for every spell level upcasted.   A creature's does not lose a spell slot when interrupted by the ear worm.  No additional saves effect if the spell comes off except the caster losing concentration.