"Is it the sound?" The old man's eyes lit up: "Those corpse monsters rely on sound to act. Are there any sounds here? Let's listen to them."

Zuo Qingcang nodded. At that moment, the two of them no longer communicated, but held their breath and focused, listening to the surroundings as much as possible to see if they could hear any sounds.

But after the two of them stopped talking, in the dark passage, except for the night pearl that was still radiating fluorescent light, and the breathing of the two of them in their ears, they could not hear any sound.

The old man frowned and said, "Isn't it here?"

Zuo Qingcang guessed: "This maze was so complex that it was absolutely impossible for the original designer to not consider the sound issue.

The problem with this sound is probably caused by the outside world. Just like the mouse that escaped from the thief, it is probably a natural change similar to an earthquake. There is a place in this maze that leads to the outside world.

So this sound is probably only heard in some part of the maze.”

The old man nodded: "Then it seems that we still have to go through this maze. Fortunately, the food is enough for 70 days, and such a long time should be enough."

Although he made such a judgment, both the old man and Zuo Qingcang were a little unsure. But without any other way, the two continued to walk along the passage, trying to find the speculative voice.

While exploring in the maze, Zuo Qingcang would use a dagger to engrave a number on the right hand side of the entrance passage, counting the number from 1. Then every time the passage they chose was the middle passage.

The purpose of this is that if he hopes that they will continue to walk on, in theory, as long as the mark is not removed, the maze is not endless, and they will always encounter a stone chamber marked by them. Then, according to the rules of selecting the left-hand passage of the mark entrance, the overview of the maze can be slowly calculated.

This is a solution without knowing any maze principle. It also increases the time spent on checking the marks around each time the two men enter the stone chamber.

When they came to a stone chamber again, the old man and Zuo Qingcang checked each other, but still no marks were found.

The old man said discouragedly: "Is this mark really useful? Could it be that our marks have been erased by something?"

There was no expression on Zuo Qingcang's face, but he said lightly: "I thought about it carefully. This possibility is very small. First, because we have just tested it and we observed it for half an hour, this mark will not disappear.

Second, if it really disappears, it will only disappear after we leave. If we have not encountered marks so far, it is because the marks are erased before entering that room without leaving any trace.

Then the other party must have the ability to perfectly restore the ground and walls. Secondly, we can detect our movements and arrange the room intelligently. We can arrange the room by means of not knowing whether it is a space or a mechanism, and confirm that the room marked is eliminated, so that we can enter."

Zuo Qingcang said a lot, but in fact he meant one thing: "Although this ancient tomb is very powerful, we cannot think too much about the ancients. The technical means I just mentioned may have exceeded the technology they can achieve. If they have this technology, they don't have to be so troublesome. They just use the monitoring means to cooperate with the resilience manufacturing mechanism, and they just kill the person."

In the following time, the two of them kept wandering in one stone chamber after another. According to Zuo Qingcang's own count, it took them about fourteen hours, and the number of marked rooms in the room had reached 204. But until now, they still haven't encountered any marked rooms.

At this time, the two were sitting in a new stone chamber to rest. Compared to the old man's despair, Zuo Qingcang's cross-legged ground, even breathing and heartbeat didn't seem to have any huge changes. From the beginning of his exploration, he was trying to minimize his physical energy consumption.

Because in this maze, when food is limited, it is obviously very important to preserve physical strength and energy. It not only allows him to deal with possible emergencies at any time, but also reduce unnecessary food consumption.

The old man next to him touched his stomach and said, "I'm starving to death, give me something to eat." What the old man said was naturally a dwarf spirit.

Hearing the old man's request, Zuo Qingcang did not move, but said: "It's too early. You feel hungry now, just because you are too anxious, and today's physical distribution is unreasonable. It's far from your limit.

We don’t know how long we will stay here next, but the food is limited. So the food I will distribute in person. These foods are the guarantee for our survival and cannot be wasted at all."

Although the old man didn't want to go hungry, he knew that Zuo Qingcang was right and could only agree helplessly.

Seeing his uncomfortable look, Zuo Qingcang said, "You go to bed first, I will guard the first half of the night, and you will guard the second half of the night."

Although he said that, the two of them had no idea whether it was night or day outside the ancient tomb. They just slept to replenish their energy. Moreover, Zuo Qingcang stayed for about five hours in the first half of the night, and he only slept for about four hours in the second half of the night, replenishing his energy a little, and ensuring that he could wake up when he encountered any danger.

After all, he was still in the ancient tomb, and he could not fall asleep peacefully without any warning. However, Zuo Qingcang himself has been tested for a long time, and he could only sleep for four or five hours a day like this, so he could last for more than a month.

However, when Zuo Qingcang was watching the night, the old man was unsuspecting and slept very hard.

During the vigil, Zuo Qingcang looked at the only light source in the stone chamber, which was the eternal light on the wall, and filtered the clues of the stone chamber maze one by one in his mind. He always felt that something important had been missed.

They had nothing to say all night, and after the two of them finished sleeping, they began to continue exploring.

After three days, the two of them had been exploring rooms, and 634 were marked, but they still had not encountered any stone chambers that had been marked. During the three days, only the old man ate a dwarf corpse, and their food seemed to be sufficient. But in reality, it was even worse.

I saw the old man walking in the passage, his eyes always wandering quickly, and it seemed that he was a little difficult to concentrate. His arms, which were shaking one or two times from time to time, and his anxious eyes all revealed that his mental state was a little unstable.

Zuo Qingcang on the other side still looked no different from three days ago, but his slightly accelerated breathing also showed that he was not without emotion.

This is also a helpless thing. For three consecutive days, everything I saw was exactly the same stone chamber, as if there was no end. They even used ropes, daggers and night pearls to do some other tests, but they couldn't find any rules.

In the end, except for knowing that they have almost lost all their sense of direction and space.

‘The mental pressure brought by this completely identical environment is too great. I can last about a month myself.’ Zuo Qingcang turned his head and looked at the old man behind him: ‘But if he continues like this, his spirit may be broken.’
Chapter completed!