The system asked me, a weak woman, to challenge a saint

The two curiously observed the small island and the water curtain that was as tall as one person around it.

Liu'er's eyes flashed with curiosity, and she asked a little confused: "This lake doesn't look that big. Why can't we see a small island in the middle of the lake?"

Xiao Yuhan was silent, giving the impression that she was thinking. Liu Er did not disturb her, but walked around and checked on her own. However, in fact, Xiao Yuhan was also asking Xiao Xuan the same question at this time.

Xiao Xuan patiently explained to Xiao Yuhan: "This layout of the island in the center of the lake adopts an optical illusion design idea. The height difference between the lake surface and the island makes the island seem to disappear from sight when viewed from a distance. Such a design The principle utilized is the interplay of perspective, perspective and reflection.

First, perspective is a key factor. When we stand far away from the lake and observe, the height difference between the island in the center of the lake and the lake surface becomes very small, almost negligible. Therefore, the island in the center of the lake will be hidden by the lake from our sight.

Secondly, the principle of perspective also plays an important role. Since the island in the center of the lake is below the lake surface, the angle between the line of sight away from the observer and the lake surface will be smaller. Under the influence of perspective, the height difference between the island in the center of the lake and the lake surface will be further reduced, making the island difficult to detect when viewed from a distance. "

Xiao Yuhan asked with some confusion: "I understand the truth, but for such a big island, even if there is nothing here, in this space we should be able to observe the hollow in the center of the lake from the shore?"

However, Xiao Xuan answered these questions without any hesitation: "Actually, you are all attracted by the stone sculptures by the lake, but you have not noticed that the lake is not flat at all."

Xiao Yuhan was shocked. She didn't notice it at all. According to Xiao Xuan, she and Liu'er stood sideways by the lake to inspect the ruins.

But what Xiao Xuan said next shocked her even more. Xiao Xuan said: "Strictly speaking, you are not standing by the lake. In fact, this place is connected to where you were standing just now. This is not the center of the lake. It's the center of a large formation. First look at the surrounding water curtain..."

Following Xiao Xuan's reminder, Xiao Yuhan carefully observed the surrounding water curtain. After observing for a while, she felt that she could sense fluctuations of spiritual power in the water flow, so she activated her spiritual vision. Under the observation of her spiritual vision, she saw that the water flow was guided by the very regular water spiritual power, rotating around the central position where they were.

This seemingly gentle water spiritual power contained huge energy. Xiao Yuhan was glad that she had no intention of swimming in the lake just now, otherwise she would be torn apart by this spiritual power once she entered the water.

However, even without the water spiritual power, she would not have been able to jump into the lake and swim. The water in the lake was too clean, dirt-free, and clearer than the water she had seen in international swimming and diving competitions in the material world. In such an environment, it is too strange to have such clear water.

"Wise choice." Xiao Xuan praised Xiao Yuhan for a rare time, "The lake you see is not simple water. There are countless Yin spirits mixed in this water. These Yin spirits are bound by the formation and become nourishment. The grand formation provides the foundation for a steady stream of spiritual power.”

Xiao Yuhan was shocked again. She could not imagine that there was such a terrifying truth in this clear lake. She asked Xiao Xuan in disbelief: "Where do these ghosts come from?"

"The first batch is unknown. The current Yin spirits were captured by the formation." Xiao Xuan replied calmly.

"How was it captured?" Xiao Yuhan asked.

"How were they captured? You'd know if you jumped in. The Yin spirits here are not just humans. All creatures that accidentally enter the lake will be captured by the formation and become nourishment."

"Fellow Daoist Chen!" A call from Liu'er interrupted the exchange between Xiao Yuhan and Xiao Xuan. She followed the call and saw Liu'er standing in an overgrown area near the center waving to her.

Xiao Yuhan knew that Liu'er must have discovered something, and she immediately walked over. Before he could reach it, he heard Liu'er's hurried and excited voice saying: "Fellow Daoist Chen, come and take a look, there is an inscription here!"

On top of a set of stone steps entangled with vines, a small stone tablet stood impressively. This stone tablet has gone through many vicissitudes of life, and some of the characters are no longer legible, while Xiao Yuhan cannot understand another part.

Liu Er curiously asked Xiao Yuhan, "Fellow Daoist Chen, can you tell what this stone tablet says?"

Xiao Yuhan did not answer Liu'er's question, but said to Liu'er: "Please tell me your understanding first."

Liu'er curled her lips angrily and said, "I haven't read any books. I only know the spells and formulas taught by the masters. I can't understand these inscriptions at all."

Xiao Yuhan said that it was indeed the case. This era did not pay attention to education at all, and the literacy rate of the people was low. Only regular sects would teach their disciples some cultural knowledge to assist their cultivation, while most of the casual cultivators could only be taught their own skills by their masters. Even if they got In a book of exercises, without the guidance of a master, even if they can guess the meaning of the words, they will not know what the words and sentences composed of these words mean.

So Xiao Yuhan wanted to take the opportunity to send Liu Er away. She said: "If you can't understand, go look elsewhere for clues. I'll see if I can decipher this broken stone tablet. Don't bother me here." .”

Sure enough, Liu Er was sent away reluctantly, and Xiao Yuhan began to ask Xiao Xuan intently how to interpret it.

Xiao Xuan observed the inscription for a while and then explained to Xiao Yuhan: "From the age of this inscription and the remaining words on it, I can roughly interpret the following meanings.

First of all, this monument was not erected by the person who built the formation, but hundreds of years later, the Prime Minister Zhuge Kongming of the Ji Han Dynasty ordered craftsmen to build it. It recorded that Kongming calculated the position of the formation based on the deduction of Qimen Dunjia. , and sent people to take away the core objects, thus causing the formation to lose part of its functions.

As for the original functions of the formation and the lost functions, there is no description in the identifiable inscriptions. It may not have been written at all, or it may have been erased. "

Xiao Yuhan looked at the densely packed small characters in the inscription. She felt that the content should be richer, so she asked Xiao Xuan: "Is there any other content that can be deciphered?"

Xiao Xuan replied: "There is still some incomplete information. The number 45 is mentioned in the front of the inscription. Then the main formation eye is mentioned, but the words behind the inscription are not legible so I don't know where it is. And what else is under the lake? The thing and the inscription cannot be recognized. Later, it was said that activating this formation requires at least activating twelve other formations at the same time. Finally, Mr. Kong Ming warned everyone that using this formation would harm Tianhe. There should be some words later, The inscription is missing.”

"45..." Xiao Yuhan pondered the number for a while and suddenly an idea flashed, "Could this mean that this formation corresponds to the Cui hexagram. If we follow this idea, we can exchange the upper and lower Kun, stone carvings for sacrifices, and condense the national destiny! It's all right! On!"