The Brown Note

You let out a low rumbling note on an instrument you are proficient in. This low note burrows deep inside the target creature causing intense discomfort.  

The target must make a constitution saving throw equal to your spell casting modifier. If the target fails they are knocked prone and take 2d8 damage, half as much damage on a successful save. 

If the target fails the save by 5 or more they immediately poop themselves.