It was a book detailing formations, which made him feel a flash of joy in his heart.

His understanding of the formation came from basic classics such as "Entering the Immortal Gate" and the classics of "Ten Palaces of Yama".

He had never specifically understood it, and when he opened the book "Formation Details", he was addicted to it.

This book explains to him the formation and how to make the most of it.

For example, the "Earth Shatter Lock Yin Array" that the prison would meet, in the past, he would only arrange it savagely, and at most he knew that the power would be more powerful in places where the evil qi was strong.

And now he knows that the formation is not only based on the simple geographical advantages, but also on the artificial feng shui arrangement.

What's more, they also look at the time of the day, and calculate which place or hour is more suitable for what formation according to the stars in the sky.

According to the book, some earth-shattering arrays can only be deployed on any day in a few hundred years!

After a long time, when the time was up for the old man to urge, he had only roughly read a small half of the classics.

He benefited a lot this time, but he only watched a small half, and he was a little unsatisfied......!

It's just that I can't read the book halfway through, and it's a haze that is obviously obscured by a spell.

Although the common sense of the first half of the content is also quite important to him, it is the latter content that makes him care more.

There is only a crude method of calculating the heavens and stars, but this method of estimating the stars is broken at the critical point, as if it tickles him.

It's not a clever idea, but it's enough to make him think.

He lowered his head and muttered for a while, and the urging voice of the old man came from not far away.

He immediately picked up this book, stood in place and thought about it, he picked up the book "Introduction to Spells" again, and then walked to the old man.

The old man saw that Feng Prison was holding two books in his hands, and his eyes couldn't help but light up a little.

Seeing this, Feng Jian tightened the classics in his hand, and after approaching the old man, he threw the classics on the wooden table and said, "Fellow Daoist, I wonder if I can print two books?"

"Rubbing books?" The old man read these two words, and then chuckled and said: "Fellow Daoist, this pavilion is not the place where those rubbing pages are printed, if you need it, you can rub two pieces of jade slip!"

The prison seal was also a doubt in his heart, and it was the first time he had heard the word jade jian.

He didn't think much about it, and asked directly, "Then I don't know how many spirit stones this jade slip needs?"

"A book of twenty spirit stones!"

"Twenty spirit stones!" Feng Prison couldn't help but raise his voice and read it again.

"Haha...... Daoist friends don't know that this is not only the content of the classics, but the material of this jade slip is also very valuable, and what is needed is the companion jade of the spirit stone to be refined into a jade slip!"

The prison seal weighed one or two, and finally put the "Brief Introduction to Spells" back, and only prepared to rub a jade slip of a classic book.

The old man took the classics and twenty spirit stones, and then he took out a palm-sized green jade piece from the small bag on his waist.

Feng Prison's gaze was directly at the small bag, he also had such a small bag.

The old man had just taken out the jade piece, and when he saw the gaze of the prison, he smiled a little smugly: "What?

Prison shook his head and said nothing, no longer looking at the small bag.

However, the old man held the jade piece in his hand, and used his divine sense to rub the content of the classic book into the jade slip, but his mouth did not stop.

"This storage bag has cost hundreds of old spirit stones, which is enough to buy most of the magic weapons, and there is a storage bag...... You can take your precious treasures with you!"

The old man paused, looked at the book in his hand and said, "If the Daoist Formation is successful, maybe you can use the Little Sumeru Array to refine the storage bag yourself!"

Feng Prison smiled when he heard this, and waited quietly for the old man to rub the jade slip.

After the old man said a few words, the jade slip was also refined.

The old man's divine sense swept into the jade slip to make sure that there was nothing wrong, and then handed the jade slip to the prison seal, and by the way, he also reminded the prison seal.

"Daoist friends don't have divine sense at the fourth level of Qi training, so you can place the jade slip directly on your forehead, and you can see the record in it. ”

Hearing this, Feng Yan felt a little novel, and after his divine sense was swept, he put the jade slip on his forehead again.

A mysterious scene appeared, and a lot of detailed descriptions drilled into my mind.