Your songs inspire great fear in those harmed by them.
BENEFIT
When a creature takes damage from a fearsome song, if that creature fails its save against the song, it becomes shaken for a number of rounds equal to the song’s original level. If the song doesn’t allow a save, creatures harmed by it can attempt a Will save (against the same DC the song would have if it did allow a save) to negate the shaken effect. If the song effect already causes creatures to become shaken, on a failed save, add the duration of this metasong effect to the duration of the shaken condition imposed by the song. A fearsome song can’t cause a creature to become frightened, even if that creature is already shaken.
MP Increase: +2 (a fearsome song costs 2 additional MP more than the actual MP cost of the song.) In addition, the perform check DC increases by +2.