Bestiary of MetamorphosisEquipment 6
Source Pathfinder Secrets of Magic
Price 210 gp
Weight light
This grimoire fancifully illustrates the spells you inscribe within it with illuminated drawings of creatures that have never existed, the pictures changing to depict new ones from time to time.
Activate 
envision (polymorph, transmutation)
Frequency once per day
Requirements You're under the effect of a polymorph spell you prepared from this grimoire that offers a choice of multiple forms
Effect You transform into a different form allowed by the polymorph by bending and molding the spell's energy. This reduces the spell's remaining duration by half.
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
GrimoireSpellbooks are useful tools for any magic user to write down incantations and runes of power, but where most spellbooks are nothing more than ink on parchment, grimoires have absorbed the magic of the spells within—magic that knowledgeable spellcasters can use to augment their spells.
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.
TransmutationEffects and magic items with this trait are associated with the transmutation school of magic, typically changing something's form.