Just as he was secretly praying and passing by a tall cabinet, the black sword in the Spirit Sea suddenly roared a few times for no reason.

Chu Xuan was puzzled: "What's the matter, Brother Hei?

The black sword whispered a few more times, in response to his question.

So Chu Xuan stopped, and took down a stone box from the square box on the high cabinet in front of him. Looking down, I saw that the stone box was engraved with the four small words "Heavy Nine Tribulation".

"Is that it?

Chu Xuan confirmed again and again, and the black sword responded one by one. It seems that the secret in the box must not be simple.

He didn't hesitate any longer, and immediately consumed a purple key to open the stone box. I saw a roll of yellowed bamboo slips silently placed in the box, and when I opened the bamboo slips, although the words on it were a little blurry, fortunately they were barely legible. I'm afraid that this bamboo slip has some history.

"It's really extraordinary!"

The bamboo slips were started, and Chu Xuan only read them cursoly, and then he was ecstatic in his heart. I am afraid that this formation is much more wonderful than Zhu Yan's set of "White Tiger Formation" that day, and it can be described as a boutique among the best.

He immediately studied it tirelessly, secretly planning in his heart, no matter what, he had to write down the content of this formation word for word. This reading was a whole morning, and it was not until the other disciples of the third layer had gone up to the second level that he finally wrote the whole book, and then sealed it and put it back in its place.

"That, old black, black brother, is there anything good, come across it and remind me. ”

Because the top of the list was in the attic on the second floor, he could borrow two secret books, so Chu Xuan had one more chance.

However, this time, the black sword ignored him and didn't say a word for a long time, as if he was disgusted with the other party's insatiable greed.

No, Chu Xuan still had to go up to the third floor, so he didn't dare to delay too much time, so he had to pick a stone box and open it.

"Phantom Dream Array?" Hearing the name is not simple, Chu Xuan couldn't help but feel happy in his heart.

I don't know what kind of luck he hit, this "Dream Array" is actually a very good formation, although it is slightly inferior to Fang Cai's "Heavy Nine Tribulation", but it is not simple, at least it is on par with the "White Tiger Array".

Chu Xuan pressed his temperament and read through the whole book, due to the limited time, he had no time to study it carefully, so he could only write it down first. Remembering that it was almost there, he quickly left the second attic and came to the top pavilion.

Zhu Yan had already gone up to the third floor, only to see her holding a thick thread-bound ancient book, leaning against the wall, sitting cross-legged, reading obsessively, not paying attention to Chu Xuan's arrival at all.

"Senior sister, senior sister, senior sister!"

Chu Xuan called three times in a row, but the other party ignored it, thinking that he was indulging in it and couldn't extricate himself. He found himself bored, so he stopped greeting her and turned to pick out his secrets.

"What's the situation?"

Chu Xuan casually picked up a box, looked over and over again, and found that there was not a word on it. So I gave up and picked up another one, and found that it was still the same, and I couldn't see a word.

"Brother Black, I can only rely on you. Ahem, give me some hints!" Chu Xuan said in a low voice.

Helplessly, he muttered to himself several times, but the black sword was silent, and probably the black sword didn't know which stone box had good things in it.

"Damn, I've heard that there are a lot of useless books on the third floor, wouldn't it be a pity if I got it wrong with my shaking hands?" Chu Xuan said with annoyance. This was completely said to the black sword, and the implication was that he still wanted it to help.

Helplessly, the black sword let out a weak and weak moan, as if to indicate that there was nothing he could do.

"Alas. Chu Xuan sighed and had to do it himself.

He picked left and right, hesitated back and forth for half an hour, and finally selected a stone box from the square of the bookcase.

When I opened it, I saw a few pieces of tattered paper in the box, and on one piece of paper headed by it, three big red characters were written crookedly - the secret of the tower. The color of these three big characters is completely different from the hundreds of small characters on other pieces of paper, and I don't think they came from one person.

"Strange! Whose handwriting is this, and how is it so familiar?"

Chu Xuan stared at the three words on the piece of paper, thought for a moment, and suddenly reacted, this font is so similar to the words on his own book of peeping at the sky!

"These three words, could it be that Sima is a senior, no, could it be that the master wrote it?" Speaking of which, Sima Qing had already accepted him as his apprentice, so Chu Xuan should call the other party Master.

"Well, it's really written...... Ugly!"

He stared at the three deficits for a long time, and finally came to a conclusion. I was about to study hard, when I suddenly heard Zhu Yan's voice from behind me.

"Huh, Brother Xuan, when did you come up?"

"Senior sister, I've been here for a long time, and I just greeted you, but you ignored it. Chu Xuan pretended to be unhappy.

Zhu Yan was a little reluctant, and said, "Senior sister just looked at it too seriously, and she was almost stunned. By the way, Brother Xuan, have you picked out any books, can you let me read them?"

Chu Xuan didn't seem to be joking when he heard her, so he had to reluctantly hand over the "Imperial Tower Formula". Zhu Yan saw his strange appearance, and said with a smile while taking it: "Brother Xuan, don't worry, Senior Sister is just helping you see how the quality is." ”

Chu Xuan's face turned red and white for a while, and he said embarrassedly: "Where does Senior Sister say, even if you really want to see it, I won't have an opinion." ”

"Really?" asked Zhu Yan with a smile.

"That's... Nature. "That being said, in fact, Chu Xuan is worried, this senior sister, she doesn't really want to see it!

"Look at you're scared, I'll tease you. Zhu Yan knew what he was thinking, and he stopped joking with him, and instead lowered his head and looked carefully at the "Imperial Tower Technique" in his hand.

"Not good, not good, not good. Zhu Yan looked at it, and suddenly shook his head again and again.

"What's the matter, Senior Sister? Could it be that this is a useless book?" Chu Xuan saw that she was saying three things in a row, so he hurriedly asked.

Zhu Yan said with some regret: "Well, this is indeed a useless book. ”

"No!" Chu Xuan couldn't believe it.

Zhu Yan said: "Brother Xuan, see it yourself." As he spoke, he handed the "Imperial Tower" back to the other party.

Chu Xuan took the "Imperial Tower Formula" and browsed it carefully, and the more he looked at it, the more frightened he felt.

"How about it, Brother Xuan, Senior Sister didn't lie to you. This 'Imperial Tower' is neither a body method, a technique, nor a formation, but a book of imperial objects, the thing that is protected is called the Prison God Tower, you don't have the Prison God Tower, and it is useless to get it. ”

However, Chu Xuan didn't pay attention to her words, but was shocked in his heart: "No, no! This thing must be useful to himself!"

He suddenly remembered something, didn't the little iron tower he picked up from the black ship happen to have seven layers? Thinking about it, he reached out and probed, and found that the small tower was still hanging from his waist.

"Why don't I try it here, whether this 'Imperial Tower Technique' is useful or not!" made up his mind, and he began to study it seriously.

"Senior brother, aren't you leaving?"

Zhu Yan saw that the time was almost up, and was about to leave, when he turned his eyes to Chu Xuan, and found that the other party was still in the top pavilion, so he was a little strange, and he didn't know what he was going to do.

Chu Xuan said: "Senior sister, let's go first, and I'll leave later." ”

"Okay. Zhu Yan didn't think much about it and went alone.

So Chu Xuan stayed in the attic alone, holding the imperial tower trick in his hand, concentrating and meticulously studying it, and studied it from noon to sunset, and finally wrote down the whole book word for word.