Polymorph

The successful application of a Polymorph spell gives the target character animal traits. While Polymorph is not a spell on it's own, it comes in different variants which will cause distinct transformations to the target.

The spell can be learned by participating in the Transfiguration Class in the gym, which unlocks the sheep variant. Eating an animal candy will teach you the corresponding variant (LPT: If you disable the corresponding tags (Mon/Ani/Ant), you can eat the candies and get the spells without suffering the effects). The spell costs 1 Spell Point for each execution.

Variants

Every completion of a spell variant adds an additional animal trait to the target character. Animal traits are applied in a specific order, though some conditions can affect set order. If the target already has different animal traits, the spell may reverses or replaces some of them. The same applies for Mythic Form variants.
The general order is: Tail -> Ears -> Legs -> Hands -> Facial Features -> Quadruped.

Bunny

Learned when consuming the Bunny Candy (pink).

Canine

Learned by consuming the Candy Bone (silver).
Stats affecting effects are:

Cow

Learned by consuming the Butterscotch Candy (gold).
The Cow Spell will let the target grow Bull Horns after the matching ears, growing into Big Bull Horns, after the hands got transformed and a Cow Udder, as the last step of the transformation (the udder won't be removed from other Polymorph or Mythic Form spells, but will disappear with Breast Reduction. It also can lactate.)

Feline

Learned by consuming the Cat Candy (violet).

Fox

Learned by consuming the Fox Candy (orange).

Sheep

Sheeps also grow Ram Horns after the matching ears.