Trickster Tengu Feat 17TenguSource Ancestry Guide pg. 59
You can transform yourself or the bodies of others to express your displeasure. Once per day, you can cast either
aerial form or
baleful polymorph as a 7th-level primal innate spell. You must take the form of a bird when using this aerial form.
Traits
Tengu: A creature with this trait is a member of the tengu ancestry. Tengus are humanoids who resemble birds. An ability with this trait can be used or selected only by tengus. An item with this trait is created and used by tengus.