Extra Wild Shape( Ghostwalk, p. 32)
You can use wild shape more frequently than you normally could.
Ability to use wild shape,
You can use wild shape two more times per day than you otherwise could. If you are able to wild shape into an elemental, you also gain one additional elemental wild shape use per day.
You can gain this feat multiple times, gaining two additional regular wild shapes and one additional elemental wild shape (if you have that capability) each time.
This feat first appeared in Masters of the Wild.