The brown note

You play a forbidden note that many bards have tried hiding in the depths of their records. When casted every organic creature in the area including the caster must beat a DC 14 CON save, on a fail the creature gets necrosis of the bowels forcing them to defecate their pants immediately dealing 3d6 necrotic damage and giving them disadvantage on DEX, CHA, and WIS checks and saving throws. On a success that creature is not affected by the spell.