Walking to the seventh floor, it seems to be no different from the next six floors, the same wooden floor, the same circle of bookshelves, but there are no books on this shelf, making this floor look more like a warehouse with bookshelves.

Lin Xuan looked at this circle of bookshelves and was slightly stunned, he naturally wouldn't simply think that the bookshelves here were just placed here at random, judging from the previous things in this treasure house, almost every place in this space was carefully handled, and there was almost no useless place that was placed at will.

Even if it seems to be useless, there will be some treasures stored in the wasteland of the inner treasury waiting to be discovered, then the place where this core treasure house is located must be very exquisite.

However, there is really no trace of the treasure trove here, and when you go up the stairs, you see an empty hall with a few bookshelves around it...... There wasn't even a single carpet on the floor, which was very contrary to the delicate feeling of other places before, and if it weren't for the fact that it was still in the treasure vault space, it would indeed look like it was in a warehouse.

"The core treasure trove in this Xiao Yi's mouth...... I've researched it before, and it doesn't seem to be that easy to open. The Dragon King scratched his head, he had arrived before, but he really hadn't found a way to enter the core treasury.

It is unlikely that Xiao Yi deceived them, if Xiao Yi was hostile to them, he would not let them enter the treasure vault space at all, not to mention that they had already taken some treasures, whether it was the herbs in the outer treasury or the chance in the inner treasury, they had already taken some of them.

Lin Xuan and the Dragon King took a turn on the top floor, the Dragon King had been here before, so he was very familiar with this place, but there were so many things left and right, and there was nothing else to be familiar with, after all, he could see the end at a glance.

"The bookshelves here can't be moved, they should be placed in a formation, as long as this formation is activated, we should be able to find a way to enter the core treasure house. The dragon king's face was eager, he looked like a detective who was investigating the case, and he seemed to want to study how this formation was laid out with his own hands.

Lin Xuan smashed his mouth, originally Lin Xuan didn't want to disturb the Dragon King's exploration thoughts, but it seemed that it would take at least a few years for the Dragon King to study the formation here...... Or maybe it won't be able to be studied for a few years.

Dao Yuan had just told Lin Xuan that the formations here were arranged in the late stage of at least eleven Heavenly Realms, and as for whether it was arranged by the Supreme Being, Dao Yuan had to try it himself to be sure, after all, although Dao Yuan's vision was very high, it was just a pavilion in the air without the strength to support it.

I think that when Lin Xuan's strength was relatively low, even a cultivator at the Heavenly Realm level could discover Dao Yuan, and later Lin Xuan's cultivation was improved, and it was better to have the Heavenly Dao Protective Body, but Dao Yuan didn't have the strength to crack the things set by the Supreme Level now, maybe he had to wait until Lin Xuan had at least the strength of the middle or even late stages of the Heavenly Realm before it was possible to move the Supreme Things.

This seemingly random bookshelf, seemingly very simple arrangement, contains a very mysterious formation, Dao Yuan saw that this formation must at least be arranged in the later stage of the Heavenly Realm, so Dao Yuan persuaded Lin Xuan to quickly tell the Dragon King, it is better to go down and look at other Heavenly Realm level classics when there is time to break the formation.

"Hey, this formation is really quite exquisite, Lin Xuan, why don't you go and call the fat man over, this formation is better than the previous Fuxi formation, it's really wonderful." The dragon king would run to the bookshelf on this side, and then to the bookshelf on the other side, and from time to time he would make some exclamations from his mouth.

Although the Dragon King had been here before, he was very familiar with the furnishings here after a general look, but the Dragon King did not study this formation carefully before, before he looked more at the following exercises and martial arts, and then sensed that Lin Xuan was returning and went to pick up Lin Xuan.

This is the first time that the Dragon King has studied such a complete and exquisite formation, the previous Bagua Formation has been a little broken, and it is still a rubbing version, although it is still exquisite, but compared with this intact formation, it is still a lot worse, so now the Dragon King is fascinated.

"That, Dragon King, we are still an advanced core treasure house, and we can study this formation after a while. Lin Xuan spread his hands on the side, a little speechless for the Dragon King who was caught in the research.

"yes, I'm not researching, let's go in when I do it. The Dragon King said as a matter of course.

"......" Lin Xuan said with a wry smile: "That, Dragon King, in fact, we don't need to be so complicated, it's very simple for us to enter the core treasure house." ”

"Can you crack this formation?" The Dragon King looked at Lin Xuan's eyes and said with a smile: "I haven't heard that you also have research on formations, tell me how to break this formation?"

"We don't have to break the formation...... Just call Xiao Yi out. Lin Xuan spread his hands a little helplessly.

"Uh(⊙o⊙)......" The dragon king was stunned for a moment, patted his head vigorously and said, "Oh, look at my head, I took this as a parallel space adventure." ”

"It's okay, let's call Xiao Yi out. Lin Xuan smiled and shook his head, this place is indeed very similar to parallel space, but compared to other parallel spaces, there are only treasures and no danger here.

It's normal for the Dragon King to take the habit of exploring parallel space before, after all, if they encountered anything sealed in parallel space before, they basically broke the formation before they entered it, and this time when they saw such a huge formation, they subconsciously chose to crack the formation directly.

"Xiao Yi, don't watch the show, come out quickly!" Lin Xuan raised his head and shouted, Lin Xuan felt that this Xiao Yi must be here watching them, and it was really naughty that he didn't come down.

"Come on, come on...... A cyan light flashed in mid-air, and Xiao Yi's figure appeared in front of Lin Xuan and the Dragon King...... Lin Xuan strongly thought that this Xiao Yi must have been following him, otherwise why did he appear every time he called her, without hesitation at all.

"I'm sorry for you. The Dragon King looked at Xiao Yi and nodded slightly, the Dragon King remembered that this Xiao Yi didn't seem to like others to call her very old, and it seemed to be a child's heart, so the Dragon King didn't call Xiao Yi a senior like he did at the beginning.

"No trouble, no trouble...... Xiao Yi said with a smile, but his eyes were always staring at Lin Xuan, Lin Xuan was a little helpless, and now he was being targeted by others.

Xiao Yi raised his hands as he spoke, and the energy began to rise up on the top floor of this library, and the bookshelves placed next to him also began to faintly emit some mysterious light, and cyan lines spread down from the bookshelves, in the center of this hall on the top floor.

After a moment, the entire top floor seemed to be caught in a burst of light, and Lin Xuan once again felt a burst of light that seemed to be checking sweeping over him, and then, a soft light also emanated from his body, and this light was exactly the same as the one that shone on them when they entered the inner library to inspect before.

Lin Xuan suddenly understood that the previous inspection of entering the inner treasury should still bring them into the core treasure house, if their bloodline test was not enough, I am afraid that they would not be able to enter the core treasure house now.