Before the trip, when he was packing his things, Randy had decided to bring the black grimoire that he purchased from Miss Feng's magic shop the other day with him.
The reason for his decision was very simple. He had yet to open the black grimoire, so he decided to keep it with him at all times until he figures out a way to open it afterward.
Although based on the system's description, it seems a certain requirement has to be met before the black grimoire could be opened.
And since he had no idea what the requirements were because it was hidden just like when the system was informing him about ways to utilize the crystallized abilities.
But who would have thought that his instructor would mistake that thick black grimoire as something else entirely during the inspection of his baggage and items?
He would not have minded it if his instructor only assumed that it was a box containing his items based on the appearance of the black grimoire.