Level: Lesser Invocation, Innate 4
Components: V, S
Casting Time: 1 standard action
Target: One creature
Duration: 1 minute / Caster Level
Saving Throw: Fortitude negates, Will partial; see text
Spell Resistance: Yes
You change the subject into a Small or smaller animal of no more than 1 HD (choice between pig, chicken, weasel, rabbit, and bat). If the subject fails his/her fortitude save, the subject takes on all the statistics and (not so) special abilities of an average member of the new form in place of its own.
In addition, being turned into a small critter has a deleterious effect on the subject's mental health. The subject takes a -3 penalty to Intelligence, Wisdom, and Charisma for as long as he or she should remain polymorphed. A successful will save negates this effect.
Incorporeal or gaseous creatures are immune to baleful polymorph, and a creature with the shapechanger subtype (such as a lycanthrope or a doppelganger) can revert to its natural form as a standard action (which ends the spell’s effect).