The Brown Note

Upon touching the target creature, the caster emits an astonishingly low hum from their body, fiercely vibrating the target (often to the point of involuntary orificial evacuation).

The target must make a Constitution saving throw; they receive 3d8 Force damage on a failed save, and half as much if successful. On a successful save, the caster takes 1d8 Force damage.

The caster has disadvantage on attack rolls until the end of their next turn. 

This spell does not affect Ethereal creatures and can be used on objects.

At Higher Levels. When casting this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 for each slot level above 2nd.