After doing so, he found that there was also a hidden formation hidden in this book, which he had only seen in previous ancient books.

And the wonder of this formation is that it looks like a book, but in fact it is two books, in fact, the two books are not in the same space, the content of the book we see now is in our space, but if you want to see another content, you need to convert to that space.

I think that this kind of formation can only be arranged by people in ancient times, and now it has long been lost, but this book seems to be not a book from ancient times, so this book must be left by someone who is proficient in ancient formations.

The most important thing is that the person who can see that there is a problem with this book must have a unique feeling for the formation and is talented enough, otherwise the book has been taken away by someone after staying in the library for so long, instead of putting it there and moldy, then why would that person hide another content? Does he have any special significance?

After a while, he couldn't figure out why, but he felt that such a situation could happen to be met by Ning Xi, and even if she had a relationship with this book, let her explore the secrets.

After a calculation, he looked at Ning Xi, then looked at the book in his hand, reluctantly took out a stone from the storage ring, and threw the stone and the book to Ning Xi and said

"This is the Space Boundary Stone, you can crack the formation of this book, but this formation will not disappear as long as the book is still there, as long as you want to open the book again, you need to crack the formation again, so this Space Boundary Stone has to borrow it from you first, but when you finish reading this book, remember to return it to me." As he spoke, his eyes kept staring at the space boundary stone in Ning Xi's hand, motionless.

Ning Xi didn't notice the eyes, but kept touching the space boundary stone in her hand with her hand, feeling that her whole person was about to float, she actually had the space boundary stone that the legendary array mage wanted the most, and it was not like playing when she broke the formation in the future, and the formation of the cloth could also add the power of space, thinking of this, the smile on Ning Xi's face couldn't stop laughing, and the small dimples on her face also ran out.

Yishu knocked Ning Xi's head hard and said impatiently

"Look at your point, are you awake now? This space boundary stone is just for you to use, and it is not meant to be given to you, as for laughing like that? ”

Ning Xi glanced at it and snorted

"Cut, Master, you are so stingy, I will pay you back." I don't know how long it was, maybe 10,000 years.

After saying that, Ning Xi ran back to the room with the book and the space boundary stone, and said with his back to Yishu

"Master, I'm going to study the formation, don't bother me if it's okay, of course don't bother me if there's something!"

As soon as he was angry, his beard was about to rise, and he hummed

"It's hard for me to take care of you, and you don't have to eat dinner."

Ning Xi closed the door as soon as she entered the room, naturally she didn't hear what Yishu said, if she heard it, she had to go out and pull out her beard, if you let her not eat, it would be tantamount to killing her.

Ning Xi sat cross-legged on the bed, put the book down, held the space boundary stone in one hand, and used the power of the space boundary stone to crack the formation with the other hand, the formation seal flashed in his hand, and sure enough, the space boundary stone was worthy of being the space boundary stone, as soon as he got close to the book, the book automatically and slowly cracked a small crack, and then Ning Xi was unconscious for a moment.