When I opened "Demon Exterminator**", it turned out that this was a formation, which seemed to be much more complicated than ordinary formations, Xu Dong was an absolute layman, and he didn't even understand the most basic formation principles

He remembered that a few years ago, when he opened the gate outside the Linggu Gate, under the guidance of the Imperial Sword Master, he even broke through the multiple formations of Fang Wei's disciples, and that tense and exciting feeling still made him excited when he thought about it

"You must consult my master on this matter, and the Imperial Sword Master, only he can give me some guidance."

Thinking like this, Xu Dong asked Yaqian to call the Imperial Sword Master

The Imperial Swordsman arranged an air array around his secret room, and he only told Ya Qian about the secret spell that broke the air array, so only Ya Qian could break through the air array and approach the third secret room

Yaqian walked to the third secret room and knocked on the door, and the imperial swordsman immediately opened the door and came out of the secret room

"Aha," the water attribute puppet of the Imperial Sword Master appeared at the door of the secret room, and he looked at Xu Dong, "You kid, what's the matter, you have to disturb me."

Xu Dong hurriedly handed him the "Demon Exterminator**", "Master, look at what this formation is all about"

The Imperial Sword Master took it and looked at the water attribute puppet's face, and immediately looked surprised, "Where did you get this?"

Xu Dong told the truth about opening the fourth secret room, including seeing the posture of the four senior brothers and sisters when they died in the secret room, and he told the imperial sword master in every detail what the names of the four senior brothers were

The Imperial Sword Master listened to it and said in a deep voice, "If I am not mistaken, the four senior brothers and sisters of Xia Fan, Dong Jian, Chun Jing, and Qiu Shuang are the 4,550th Cave Master ...... of the Lotus Cave."

Xu Dong's memory of the Imperial Sword Master had to be admired, and he thought that a naked soul after losing his physical body might be higher than ordinary people in all aspects."

The Imperial Sword Master shook his head again, sighed, and said, "Alas, this exercise has been secretly practiced by several cave masters, and these four senior brothers and sisters have gone the farthest, and they have almost practiced to the end, but unfortunately they still failed in the end."

Xu Dong asked, "Why is this exercise so difficult to practice?"

The Emperor Sword Master said: "The future generations of the Lotus Cave cave master know about this, and he doesn't think how difficult this exercise is, but it has been lost for a long time, and now this secret room has to be opened, so that this exercise can reappear, and it seems that the fate of the Dao has arrived."

He took the book in his hand and flipped through it, "This is a composite formation, which contains a lot of formation elements, but we are now stepping on the shoulders of our predecessors, and the hope of success is great."

The Imperial Sword Master continued to analyze: "Divide this exercise into four parts, practice it by one man, three women, and then synthesize it, this method may be right, what is the problem?"

He slowly flipped the book back, "You see, there are many places in this book, and there are many places in this book that are drawn with a red pen, and there are many annotations in the margins, and the handwriting of the annotations is different, all of which are the experience accumulated by the predecessors."

"I think so," the Imperial Sword Master said, "You make a backup of this exercise, put the original in my hands, and both of us will ponder it carefully to see if we can come up with a way to crack it."

Xu Dong nodded, and immediately copied this exercise to a jade ring, and the emperor swordsman was very attentive after getting this exercise, and hurriedly took the book into his third secret room

After the Imperial Sword Master left, Xu Dong looked at the contents of the jade ring with the "Heavenly Eye" of the Purple Mansion, and the contents of the jade ring were clearly revealed, and he had an idea in his mind, and he was ready to retreat and practice in the fourth secret room for a few days

After he greeted Yaqian, he was about to enter the fourth secret room, because he hadn't seen him for a few days, Yaqian was very reluctant to Xu Dong, and accompanied him to the door of the secret room, and held her hand for a long time

After Xu Dong entered the fourth secret room, he closed the stone door, and the first thing that entered his nostrils was a rancid smell, which was gradually replaced by fresh air as time went on

He searched for the source of this fresh air, which had a hair-thin crack in each of the four stone walls of the room, and when a steady stream of fresh air flowed into the room through the cracks, there was a sharp whistle

"What's going on?"

Xu Dong approached one of the cracks and used Zhihai to inspect them, and found that there were many fine particles flowing in through the cracks, and when he looked closely, he saw that these particles were sticking towards a wall

It was strange how such a thing could happen, he couldn't figure out the principle of this, and he couldn't find an explanation for this kind of thing in his previous experience

But when I think about it, it is not surprising that anything strange can happen in this strange cave, and if nothing strange happens, it would be strange

He wanted to put all his energy into practicing, taking back the "Heavenly Eye" of the Purple Mansion and pouring it into the jade ring, but after working hard for a long time, he felt that he still couldn't concentrate

On the contrary, an irresistible exhaustion hit his mind and body, and he felt that the qi veins in his body were blocked, and he had to sit down against the wall, and he was confused for a while, so that he could nourish his qi and blood

But at this moment, a phenomenon that is even more inexplicable by common sense appeared

On the wall opposite him, the tiny particles were piled up thicker and thicker, and in a slight popping sound, they glowed in a variety of different colors

Gradually, the light colors are constantly changing and recombining, forming a vivid picture, from the initial blur to the clear

What's more, he can't believe that this picture is three-dimensional, and the characters on the picture can approach him and talk to him like a real person

The first to appear was a man of fifty-five or sixteen years old in a robe, followed by two mature women, and finally the girl of fifteen or sixteen

Xu Dong is of course familiar with the four people who appear on the screen, they are the masters of this secret room: Xia Fan, Dong Jian, Chun Jing and Qiu Shuang

Xia Fan took the three women and bowed to Xu Dongyi, "The new cave master of the Lotus Cave, the remains of our four senior brothers and sisters have been here for so many years, thank you for collecting our bones."

A woman behind him gave him a thumbs up and said, "Senior brother's vision is good, he has concluded that the current cave master of the Lotus Cave is a benevolent and righteous gentleman, and now it seems that you are really worthy of such praise."

Xia Fan said to Xu Dong: "Tell you the location of this secret room, I used up my last trace of soul power, and the reason why I did this is mainly to determine your cultivation ability."

The youngest woman said: "Senior brother has been looking for talents among the successor cave masters, because you can rest assured that you will be the new cave master by handing over "Demon Killer**" to a virtuous and talented person."

Xia Fan said: "Save these polite words for the time being, don't take up precious time casually, we will start talking about business now, the purpose is to remind the new cave master to avoid detours."

He then said: "New cave master, you must have such conditions to practice "Demon Extermination**"

"First, divide the exercise into four parts, and practice it separately by a man and three women, and the male must have the qualifications above the body of the three yangs, and the body of the three yin and the body of the jade and phoenix chalcedony."

"Second, practicing this exercise pays attention to the coordination of yin and yang, and it is suitable to practice secretly in caves or other confined places to prevent the leakage of Yuan Yang and Yuan Yin, in other words, to use the secret room effect."

"Thirdly, there are a total of thirteen formations in this exercise, which are arranged according to the four seasons of spring, summer, autumn and winter, and each season has three formations, and the extra formation is the final synthesis."

"The above three experiences are almost unbreakable truths that we have gained after hundreds of attempts and struggles, and now we will demonstrate the twelve formations that we have practiced to the new cave master."

Saying that, the four of them spread out into a formation, coordinated and cooperated with each other to form a formation, which was sometimes slow, sometimes urgent, sometimes complicated, and sometimes simple, which dazzled Xu Dong

After the demonstration of the first formation diagram, the four senior brothers and sisters stopped, Xia Fan approached and asked Xu Dong: "New Cave Master, this is the first of the twelve formation diagrams we have practiced, have you remembered it?"

Xu Dong hurriedly shook his head, it was impossible for him to remember anything in such a short period of time

"I don't remember it, do we, then we'll show the new cave master another demonstration."

After saying that, the four senior brothers repeated the routine just now, Xu Dong looked at it silently, almost holding his breath, this time Xu Dong found out some rules of formation changes

"Is the new cave master impressed, let's show you a few more times, if you remember it, just tell us, and we'll start to change to the next formation."

Xu Dong nodded

The four senior brothers and sisters took the trouble to repeat a routine, and I can't remember how many times they have demonstrated it, but a lot of time has been consumed, and I watched it for a long time, and it was consumed like this

In fact, this is really not Xu Dong's stupidity, if it is a more intuitive move, he can remember it once or twice, because this formation is too complicated, redundant, treacherous and changeable

It's no wonder that these four senior brothers and sisters may have spent months or even years practicing such a formation diagram in the first place, no matter how talented Xu Dong is, it is impossible to digest it in such a short period of time

When the demonstration of the repeated routine was completed again, Xu Dong said to Xia Fan: "Well, I almost remember, you guys start to demonstrate the next formation diagram."

The three women all praised Xu Dong together: "Wow, it is worthy of being a thundercloud spirit root cultivator, and it only took half a day to remember this first formation, which will take at least two or three months for people with ordinary qualifications."

"It's impossible for two or three months, I think it only took me two or three hours to memorize it."

"That's why we said that Senior Brother had the vision to choose such a talented junior to complete the unfinished business for us?"

Xia Fan said: "Don't say these words, let's hurry up and demonstrate to the new cave master, the new cave master must be busy, we try to save time for him, see if we can finish this work in five days."

The fourth senior brother and sister began to demonstrate the second formation diagram, this formation diagram seemed to be more concise than the previous one, Xu Dongman was sure that it would save at least half of the time, but he didn't expect this hope to be disappointed in the end

Some tricks seem simpler than others, but that's just the surface, but in fact it's more complex in some of the specifics, making it more difficult to figure it out