Source: Complete Champion
You enhance your own abilities with the characteristics of animals.
Benefit: Once per day as a swift action, you can give yourself the power of a specific animal. Select one of the following abilities each time you activate the feat. Each effect lasts for 1 minute.
Ape's Fury: Gain a +2 sacred (if your deity is good or neutral) or profane (if your deity is evil) bonus to your Strength score. The value of this bonus increases by 2 for every six character levels you possess (maximum +8 at 18th level). When you activate ape's fury, fur sprouts all over your body and remains until the effect ends.
Cheetah's Sprint: Gain a +5-foot sacred (if your deity is good or neutral) or profane (if your deity is evil) bonus to your base land speed. The value of this bonus increases by 5 feet for every four character levels you possess (maximum +30 feet at 20th level). Your body is covered in black spots while cheetah's sprint is active.
Hawk's Flight: You can fly as if using the overland flight spell. At 5th level and every five levels thereafter, you gain a +5-foot sacred (if your deity is good or neutral) or profane (if your deity is evil) bonus to your base fly speed (maximum +20 feet at 20th level). Intangible, luminescent wings grow from your back when you activate hawk's flight and remain as long as the effect is active.
Serpent's Strike: You gain a natural bite attack that deals 1d3 points of Constitution damage but no hit point damage. A successful Fortitude save (DC 10 + 1/2 your character level + your Cha modifier) negates the Constitution damage. Creatures immune to poison are immune to this effect. Your upper canine teeth grow into fangs when you activate serpent's strike and remain in that form as long as the effect is active.
Special: You can select this feat multiple times, gaining one additional daily use each time you take it.
If you have the ability to turn or rebuke undead, you gain one additional daily use of this feat for each three daily turn or rebuke uses you expend.
You can have multiple abilities active simultaneously. However, you can still activate only one ability per round.