Wild Binder (3.5e Feat)
From D&D Wiki
Wild Binder [Binding]
Allows a Binder to bind Fey.
Prerequisite: Knowledge (Nature) 5, Outsider Binding Class Feature
Benefit: At level four a Binder can bind Fey with less than 1 HD. At level six, Fey of 1 HD or less. Level Nine, Fey of 5 HD or Less. Level Thirteen, Fey of 10 HD or Less. Level seventeen, Fey of 15 HD or Less.
Normal: Normally a binder can't bind Fey.
Special: Can be taken by a Binder as a Bonus Feat.