Back to the story of young Tild (wearing the school's uniform) discovering the wonders of the Academy of Magic! She and her class are headed to one of the giant mana crystal surrounding the Academy.
Built in the Tower of Alchemist , these are tremendous concentration of magical energy, enough to create a pocket dimension. Each Crystal was created as a special training ground adapted to each major kind of magic so the student can feel more easily the difference between mana types. For example, the Crystal Realm for pyromancy is a scorching place with deserts, volcanoes and flames, the aeromancy one is all winds and thunderstorms and so on. Each crystal is supervised by a high teacher who is responsible for specialised elemental classes and of course the safety of the students.