When you perform a song that affects more than one creature, one opponent finds it more difficult to resist.
When performing a song that affects or targets more than one creature, you can choose one target or creature within the song effect. That creature’s saving throw DC to resist the song is increased by +2. You must choose which target to focus the song on before performing the song. Songs that do not require a saving throw to resist or lessen the song’s effect do not benefit from this feat.
MP Increase: +1 (a focused song costs 1 additional MP more than the actual MP cost of the song.) In addition, the perform check DC increases by +1.