The ArM5 p.116 box guideline to create a magical beast is level 50 - and this guideline is used when creating magical creatures like an ArM5 p.193 wolf and an ArM5 p.194 dragon in HP p.126 Creating Magical Creatures:
The Order of Hermes has spells that create magical animals, causing the lazy-
minded to think that finding a magical animal is a needless bother. Correct to
a degree, the rub is that such rituals are always high-magnitude ritual spells, and the time spent researching and inventing one of these rituals could be spent gathering a multitude of different types of creature. These rituals are creature-specific, in that a Creo Animal spell with an Ignem requisite designed to create a salamander will not create another magical beast that may also be aligned with Ignem. A spell that creates a magic animal is always a ritual, and cannot be instilled in an enchanted device. For the magical animal to have magical powers, requisites need to be included, based on the Form of the individual powers, and Vim is always a requisite.
If the beast is intelligent — having an Intelligence Characteristic instead of Cunning — the ritual needs a Mentem requisite.
EDIT: This also makes sure, that PC covenants don't turn regularly into computing centres before their time, where lots of magically created little intelligences slave away on tasks like processing texts or images.