Capítulo 134: True Library Expedition II: Primer

"The deeper you venture into the Library's halls, the greater the secrets those halls hold…and the greater the dangers as well. Among the real scrolls and tomes are many false ones, traps for the ignorant that will inflict curses on those foolish enough to spring them. They may even be enough to kill the particularly stubborn.

However, in each level of the Library's collection, there is one special book that holds neither curse nor information that I once gathered. Instead, it is the key to descending further. To determine the identity of the key, you must find and solve several puzzles hidden throughout the collection level.

Now…there are also guardians on the collection level that will not tolerate its shelves being disturbed. A Sacred Beast could probably fight off one, but the commotion would cause dozens more to swarm upon them, so even they would not be safe.