Replying...
Intro. In this world, many have the ability to have a magic familiar (they can be pumped and taught). Most can have only one, the ability to have two is a rarity, and a very small percentage of people, elves, beasts, etc. It may have 3 families. When a person (and so on) receives the ability to have a familiar, he must call him a spell or a magical circle (each they have his own). And so, you entered the Academy of Magic Sensors, you checked how much you can have familiarity, you showed 1. (In fact, you can have more, but not you, not others do not know about it)

School of Magical Familiars

@Ернест