Gu Xi said: "Don't underestimate this pile of sand buildings, each one is soaked in the blood of living people, and the blood and qi are used to operate the mechanism that drains the entire space. On the first day it was piled up, it drank the blood of its master and returned to its roots. After that, you need to drink blood often, otherwise once the sand particles collapse due to air drying, it will be in ruins from the bottom to the top. ”

My hand twitched, it was just because of the damp environment underground, and then it gradually dried and solidified, but it turned out that it was the blood of the living that really solidified it. Thinking of the sand seat just returned to its original position with one hand and one hand, I don't know how much human blood I had handled, I suddenly felt that my hands began to feel cold, and I couldn't wait to wash it dozens of times immediately.

"Do you know why our shadow appears on this sandbox?"

Listening to Gu Xi's question, I still shook my head, which is also something I can't figure out. Just now, Father Xie has been trampled under Gu Xi's feet, and the flashlight has also reached his hand, and the light is all condensed on the sand table to explain to me, so that he and I are behind the beam. It stands to reason that it is impossible to make a shadow on the sand table, but I see that there is still our shadow in the position of the stone plate, and even the Xie family's father and son and the old Xie Tou are lying down and bear the shadow in the same way.

"Because the ground we are stepping on is black light ore, and so is the top of our heads. What you think of as darkness is not really darkness, it is a visual illusion caused by the reflection of black light. ”

I can't put into words how stunned I am, I've never heard of such a thing as black light ore. But even if this is the principle, then why ...... "Our shadow is so small?" ”

"I haven't thought of the principle yet? Each piece of ore has many faces, and each side is like a mirror, as long as it is artificially created, it can make the people who appear in the space refract the shadow to this sand table many times. It's like if you're standing here right now, it's a shadow of a sand table, and it may have been refracted hundreds of times before it has the current effect. ”

Well, I was confused: "Why don't you just use the ore overhead?" ”

Gu Xi pulled the corners of his mouth slightly, "Perfect." If we take the shadow directly, then our shadow will cover the sand table and be out of proportion to it. In order to achieve a perfect fit, it must be projected in such a way. ”

I think this sand table maker is a person with extremely serious obsessive-compulsive disorder, and he is also a strange person! Yes, that's right, a strange man. "What kind of project would it be to keep the proportions of the figures refracted on the sand table in every part of the entire space?" I said with great emotion. But Gu Xi vetoed: "It's not that complicated, the simplest principle of physics, only a large enough light mirror is needed outside the city wall, which can include the figures refracted from all corners, and then it is reflected back to the special concave mirror directly above the stone plate, and the shadows on the stone plate will be all figures of a uniform size." In addition to the fact that the position we are standing in is more complicated, we need to calculate it from various angles to achieve perfection. ”

I was speechless, and I felt that the person who made the stone plate was magical, and the Gu Xi in front of me was even more magical. He was able to tell the same story as if I had seen him in person, and I wondered if I had come in the same way as him.

Asked a question that was always hesitant: "Can you see?" ”

As soon as the question came out, Gu Xi smiled secretly, and said instead: "I can't see it." ”

"But how do you know this, and you can still avoid the dangers in the trapped dragon array?"

He gave me an answer that couldn't be more mysterious: "Feeling." ”

Well, it feels.

I didn't bother to ask any more, anyway, if he didn't want to say that he would break the casserole and ask in the end, he couldn't ask why, so he simply changed the topic and compared with the three people underground, "What should I do with them now?" ”

"I've always used other people's blood to sacrifice the sand table, so this time I might as well try it with their own blood."

I felt a pang in my heart, and I wanted to persuade them, but these two people were really guilty, especially if Gu Xi and I were going to investigate elsewhere, whether we took them with us or stayed would be a hidden danger.

Just as I was hesitating, I saw Gu Xi's figure flashing, and after two muffled snorts, the Xie family's father and son stopped moving. My heart was pounding, and I took an uncontrollable step closer under my feet, but I couldn't help but breathe a sigh of relief when I found that the two of them were still heaving in their chests, and Gu Xi just knocked them unconscious. However, when I saw the person being dragged up by Father Xie's collar, I couldn't help but speak anymore: "Do you really want to sacrifice this stone plate with their blood?" ”

Unexpectedly, Gu Xi grinned and said with a smug smile: "I know that you will also be a woman's kindness, these two people have been villains one after another, so I naturally have to tie people up." ”

I don't have any opinion if he really wants to practice that, but where can I go to find a rope to tie someone up? He didn't explain, he only mentioned that Father Xie walked into the dark, and after a while, he came over and lifted Xie Fu and Old Xie Tou respectively, and when he came back, he was empty-handed, wiping with a piece of gauze, with an expression of disgust that the three of them had dirty hands.

I looked over there, but I couldn't see anything in the shadows, and I said that as long as I didn't kill anyone, I would be fine. Gu Xi finally wiped his hand satisfied, raised his head and asked quietly, "Do you want to go around elsewhere?" ”

I was stunned for a moment, then turned to laugh. I'm afraid that he Gu Xi can say that this kind of place is like casual street shopping, and nodded very seriously, "Of course." ”

When I left the stone plate, I deliberately glanced at the sand table on it, and then followed Gu Xi to the depths.

If the sand table is a thumbnail of this space, then what I see in front of me is a specific scene. Because of the presence of air in this space, Gu Xi said that it is not really dark here, so I don't feel strange when I see plants and flowers. But when I saw a house in front of a house, with white flowers all over the ground, I couldn't help but widen my eyes in shock.

I have never forgotten the scene of the first meeting with Gu Xi, who was sitting on a dark tree and suddenly startled me by his voice and asked me what kind of white flowers were in the flower stand. And the flower is the same as the one in front of me, it has a nice name called Crystal Orchid, but it also has a strange name called the Flower of Death.

The only difference is that compared to the one in the garden of Guxina, here it is ten times more.

I found that even Gu Xi put away his casual expression, staring at those crystal orchids thoughtfully. The white flowers are crystal clear, almost transparent under the light of the flashlight, and you will feel particularly enchanting.

Moving his gaze from the crystal orchid to the house behind him, imagine if there had been a person living here, what would be the state of mind of a person living in a house surrounded by the flowers of death?

As soon as my hand was pulled, I felt that the shadow next to me moved, and Gu Xi had already pulled me towards the house. He didn't have any scruples about stepping on those flowers, but I somehow felt flustered when I stepped on the crystal orchid. The house is an old structure, with gray tiles and gray walls, black and dark two-leaf wooden doors, and two knockers on the door, but they are not locked.

When the wooden door was pushed open, there was a creak and a smell of decay came to my face. I covered my nose and looked inside, and my whole body froze, this room ...... I almost couldn't wait to walk into the house, look around, and the more I looked, the more frightened I became.

Gu Xi noticed my abnormality and asked in his ear, "What's wrong?" ”

I didn't bother to answer him, and pushed open the only wooden door in the room, my eyes fixed, and a voice in my heart was about to move......

And so it was.

Gu Xi was stunned when he walked in behind me, and muttered hesitantly: "Why is this room ......?"

"Does that sound familiar?" I asked him back.

Dark eyes flashed blue, "That painting? I pursed my lips and smiled, Gu Xi may not be good at painting, but his keen intuition is beyond the reach of others, even if the scene in this room is completely different from the pen pal's painting, but he also notices something unusual.

The painting, which I used to infer the age of the pen pal, showed a scene of a house with a few simple strokes, followed by the back of a teenager sitting in front of a closed window. The color palette of the whole painting follows the usual style, with dark colors as the main color. This is the one that pen pals use the most scenes, but it is different from this room.

I asked Gu Xi to sit at the table, and he rarely listened to me obediently. When he was seated, I looked up with a smile on my face, and the answer was here.

It was also thanks to the previous understanding of the principle of the stone plate that I reacted intuitively. The whole room is arranged and arranged completely differently from the painting, with the table in the center, the closed window at the back, and the wardrobes on the left and right sides are not against the wall, but are all disorderly and haphazardly shelved. I'm sure that even if anyone has ever seen the pen pal's painting, they won't feel like it's a painting when they walk here.

The key is that the black light ore of about one square meter on the top is like a three-dimensional mirror embedded between the beams and columns of the roof. And all the seemingly chaotic arrangement, once reflected on it, takes on the scene painted by the pen pal. Including Gu Xi sat down at the table, it was his back that happened to be reflected in the black light ore, and the window that was five or six meters away seemed to be close to him.

As for the room that enters, it is not based on this principle. The reason why I freeze as soon as I open the door is because as soon as my eyes touch the scene in the house, all kinds of images fly in my mind. It's not that I've been here, but the pen pal's style of painting and the artistic conception he hides in the painting are in line with the whole house.

It's almost certain that pen pals were here twelve years ago.

He borrowed Xie Fu's name to write to me, and there is a secret room at the bottom of the post office, which I believe must be connected to this space. The pen pal went out through that door to the post office and dropped off the letter. But why did he hide those fragments in the painting? This question is still unresolved, and I did not find a picture of Lao Tzu riding a green ox in the house.

Or is this just a place where pen pals live, and there are other places where some secrets are hidden?