I would like to include in my world the ability for a PC to turn into an sort of aspect of nature based on one of several animals in my current campaign. I am using the transformation process for becoming a Dragonborn in Races of the Dragon as the basis for how the mechanics of the transformation would work. I just need a good set of "templates" for them to change into (Dragon born works in a wierd world between template and races. My second stab at a the first one, themed to being a gorilla avatar. Additional races I'm considering are: Elephant, Lion, Bear, Hawk, Leopard, Turtle, Shark, and Dolphin.
Avatar of Nature (Gorilla)
Upon completing the ritual of rebirth you a emerge an aspect of nature's divine fury. Your skin is now covered with a layer of thick black fur and your you face have morphed into the a distinctly simian form. You are slightly larger that typical for your previous race, but do not change size categories
Subtype: animal-blooded, you gain the animal-blooded subtype, all apells feats and other abilities that target animals may be gained/use by you.
Stat Bonuses: +2 Str, -2 Int
Base Speed: 30ft Land, 15ft Climb(only usable while carrying a light load and must have hands free).
Darkvision out to 60ft.
A Gorilla Avatar has a +2 Natural Armor bonus.
Natural Weapons: A Gorilla Avatar has two slam attacks dealing 1d4. Each attack is unusable if an item is held the corresponding hand. Examples Carrying a short sword: one attack, carrying a sword and shield: no attacks
A Gorilla Avatar has a +2 racial bonus on Climb checks and can always choose to take 10 on Climb checks, even if rushed or threatened.
Brachiation: A Gorilla Avatar may select Brachiation, even if he doesn't meet the requirements.
Automatic Languages: Gora(Secret language understandable by only other gorilla avatars similar to Druidic)
Favored Class: Barbarian or Ranger