Elemental Body III (Fire)

You are in large fire elemental form now. You have a +4 size bonus to your Dexterity, a +2 size bonus to your Constitution, a +4 natural armor bonus, resist fire 20, and vulnerability to cold. You also have two 1d8 slam attacks and the burn ability. You are immune to critical hits and sneak attacks. Your movement speed is increased by 20 feet.