When you cast this spell, you can assume the form of any Small or Medium creature of the animal type. If the form you assume has any of the following abilities, you gain the listed ability: climb 30 feet, fly 30 feet (average maneuverability), swim 30 feet, darkvision 60 feet, low-light vision, and scent.
_Small animal_: If the form you take is that of a Small animal, you gain a +2 size bonus to your Dexterity and a +1 natural armor bonus.
_Medium animal_: If the form you take is that of a Medium animal, you gain a +2 size bonus to your Strength and a +2 natural armor bonus.
#### Mythic Beast Shape I
**Source** [_Mythic Adventures pg. 85_](http://paizo.com/products/btpy8ywe?Pathfinder-Roleplaying-Game-Mythic-Adventures)
Each _mythic beast shape_ spell must be learned individually, and you must know the respective non-mythic _beast shape_ spell to learn its mythic version. You don’t have to learn them in order and are not required to know a lower-level _mythic beast shape_ spell before you learn a higher-level one (for example, you can learn _mythic beast shape II_ if you know [_beast shape II_](/spells/beast-shape-ii), even if you don’t know _mythic beast shape I_). Each _mythic beast shape_ spell adds the following benefits to its respective non-mythic version.
The spell’s bonuses to ability scores increase by 2, the natural armor bonus increases by 1, and the ability score penalties decrease by 2 (minimum penalty of 0). Choose one natural attack type the animal form has, such as bite or claws. The critical multiplier for this attack type increases by 1 (maximum ×4).
**Augmented (2nd)**: If you expend two uses of mythic power, the ability score bonuses increase by an additional 2. During each casting of the spell, a number of times equal to your tier, you can act as if you had the Natural Spell feat for 1 round. For example, if you’re 2nd tier, you can use the Natural Spell feat for 2 rounds per casting of _mythic beast shape_.