Shapeshifting

Method
Shapeshifting is a complex arcana power, which allows a mage to transform themself into the shape of another living being. This holds limit to a degree, in that it has to be in the shape of an animal which has a brain vaguely in the same format of the caster's brain. When a caster shapeshifts, they do not under any circumstance rewire their own brain. They may actually change the size of the brain by condensing or enlarging it to suit the neural connections, but they will not change its format.

Shapeshifting is done when a caster warps their own body, changing its shape to that of another being, normally an animal. The caster will initially warp their own matter, changing it to suit the animal. If the animal they are to become has more mass, then they will drain arcana, and warp it into the appropriate parts of the body. In this circumstance, this excess arcana must be maintained perfectly by the mage throughout their spell. Therefore, the larger the animal, the harder this is to accomplish. If the animal is smaller, the caster will remove the excess of their own mass, and store it as arcana in their own resonance, returning it to themself when the spell ends.