You unleash a torrent of braying laughter combined with a stream of vile expletives and invective, directed against one target within range. If the target fails its saving throw, mocking laughter deals 3d6 points of nonlethal damage. In addition, the target is filled with humiliation, shame, and self-loathing, taking a –4 penalty on attack rolls, saving throws, ability checks, and skill checks for the duration of the spell.