Since the time Jin possessed this body, he read and researched the concepts of spirit forms and the appropriate growth techniques, there were many theories on the subject. When he got a headache from all these theories, he took the easiest route and exchanged his permit to enter the third floor with the memories of a magician, a researcher specializing in this field. After taking over all the books on the third floor, he didn't need the permit anymore.
Jin was trying to expand his knowledge so that he wouldn't have problems with his training in the future, but the memories he had bought about the concepts of spirits forms and their growth techniques on a whim, became the best deal he made in his life.
Everything changed when he discovered Ming Cale's extraordinary ability and memory.
"Cale, when you stare into the void, you record something in your memory, right?"