You tap into the target's inner being and curse it to become a bestial version of itself. The effect is based on its Fortitude save.
Critical Success The target is unaffected.
Success The target's body gains minor bestial features. Its insides churn as they partially transform, causing it to be Clumsy 1 for 1 round. When it recovers from the clumsy condition, its features revert to normal, and the spell ends.
Failure The target transforms into a bestial form for 1 hour. The target becomes clumsy 1 and gains weakness 1 to silver. It gains a claw, hoof, horn, or jaws Strike (your choice) that uses the target's unarmed Strike statistics except that the damage type changes to bludgeoning, piercing, or slashing, as appropriate. Whenever the target attempts to use any manipulate action, it must succeed at a DC 5 flat or the action is lost.
Spell Effect: Bestial Curse (Failure)
Critical Failure As failure, but the duration is unlimited.
Spell Effect: Bestial Curse (Critical Failure)
Traits
An action with this trait requires a degree of mental concentration and discipline.
A curse is an effect that places some long-term affliction on a creature. Curses are always magical and are typically the result of a spell or trap. Effects with this trait can be removed only by effects that specifically target curses.
You must physically manipulate an item or make gestures to use an action with this trait. Creatures without a suitable appendage can't perform actions with this trait. Manipulate actions often trigger reactions.
These effects completely transform the target into a new form. A target can't be under the effect of more than one polymorph at a time. If it comes under the effect of another, the second effect attempts to counteract the first. If it succeeds, it takes effect, and if it fails, the spell has no effect on that target. Any Strikes granted by a polymorph effect are magical. Unless otherwise stated, polymorph spells don't allow the target to take on the appearance of a specific individual creature. If you take on a battle form with a polymorph spell, the special statistics can be adjusted only by circumstance bonuses, status bonuses, and penalties. Unless otherwise noted, the battle form prevents you from casting spells, speaking, and using most manipulate actions that require hands. (If there's doubt about whether you can use an action, the GM decides.) Your gear is absorbed into you; the constant abilities of your gear still function, but you can't activate any items. You lose your Speeds and gain those of the battle form. If a polymorph effect causes you to increase in size, you must have space to expand into or the effect is disrupted.