The system spoke, Cheng Hao naturally did not take it lightly, and slowly got into the wooden door, and sure enough, the warning sound of the wooden door system just stepped into the wooden door system came as promised.

Cheng Hao didn't have time to think about it, and fell directly to the ground.

'Whoosh! A few bowstrings pierced the darkness.

Cheng Hao lay on the ground, waited for a while, and didn't hear other sounds, which was temporarily relieved. Glancing back at the bow and arrows, the wooden door had now been shot open, and it was no longer in the way of blocking. Cheng Hao frowned his brows, and couldn't help but be even more surprised in his heart, although this wooden door had long been decayed, it was not easy to push, but now it was shot down by an arrow? What would happen if the arrow were all shot at you?

Cheng Hao didn't dare to think about it, and he didn't think about it.

After walking slowly a few times, the system's prompt sound never appeared.

After taking a few steps forward, Cheng Hao saw the bow and crossbow, not the arrow, and Cheng Hao also understood why these bows and crossbows could be activated but the outside could not!

Their traps are made of all silver!

Seeing this scene, I couldn't help but nod my head and sigh at the wisdom of the ancients. If there is no prompt from the system, then I would never have thought that there would be a gap between the outside mechanism and the inside mechanism!

Just as Cheng Hao was sighing at the wisdom of the ancients, a figure suddenly flashed out, and Cheng Hao rushed over with a dogleg knife without saying a word.

"Bang!"

The dog-legged knife slashed down, but it was not Cheng Hao's wail, and when he looked at it, he couldn't help but laugh shamefully.

It turned out that I had seen the wrong figure in a trance, where did the figure come from, it was just a stone figure.

Cheng Hao glanced at the statue distressedly and couldn't help but shake his head.

"Brother, I'm sorry!"

Just as he was about to walk out, there was a sudden creak under his feet, as if he had guessed a piece of paper.

took out a flashlight, Cheng Hao couldn't help frowning, the thing under his feet was a black layer, and it seemed to be a little transparent when he picked it up and used a flashlight to shine it.

There are still some lines on it, layer by layer, and when he was pondering, the system suddenly gave him a hint - snake molt!

Is this a snake molt?

Cheng Hao hurriedly threw away the skin on his hand and glanced at it with disgust, although it was said that the snake molt was a medicinal material, but after all, it had also been treated, and it was really uncomfortable for him to pick it up at will.

However, just as Cheng Hao took out a flashlight to shine around, he couldn't help but exclaim. The snake took up almost the entire path from which he came, and almost all of the ground was paved with him.

How long is this snake? Cheng Hao calculated the distance, and it was more than thirty meters!

Black Dragon?

Cheng Hao suddenly remembered the words of the young father and son, if that legend was true? So where is the painting of the suppression of the black dragon?

Cheng Hao was about to move forward, but he was a little apprehensive when he saw the snake molting in this place.

I have no way to estimate the age of the snake's moult, but if it is molted in the last few years, then I am not enough to stuff people's teeth!

"No, this snake has been molting for at least a thousand years or so!"

The system gave Cheng Hao a dose of reassurance.

Cheng Hao nodded, since the system said so, then he should also rest assured.

"Forget the break!"

Cheng Hao sat on the feet of the statue.

Rubbing his nose, he took out a bottle of water from his backpack and poured it straight in.

If it weren't for the big snake, then the next thing should be much smoother, as long as I can get the picture out of myself, maybe it's no problem.

After resting enough, he raised his hand and glanced at his watch, and now it had been three hours since he entered the cave, and it was already twelve o'clock in the evening.

When I got up, I was going to continue to explore deeply, but as soon as I walked to the place where I was standing just now, I found that the door that was there just now was gone!

Hurriedly looked back, and the way he came in was gone!

"What's going on?"

Cheng Hao was a little panicked, couldn't he go back?

The system sighed, as if it was anxious about Cheng Hao's IQ: "A very simple mechanism, such a dark place is not a door you saw just now!" It's just the mark of a door. ”

"Marking?"

Cheng Hao was a little puzzled, and the system continued to explain: "In such a dark place, the human eye is based on the reference object you see, and the reference object you see is yellow, and you see it in your eyes together with black, then you think there is a door there." Add that you see that it's all black, so it's naturally a wall! ”

The system is very popular, and Cheng Hao also understands the meaning of the system.

Just like painting, you can't see that side, but through the appearance of shadows, you can see the changes on the other side...... So that an image becomes three-dimensional!

Thinking of this, Cheng Hao couldn't help but take a step forward, and sure enough, he saw the yellow knocker that had fallen to the ground......

"Hehe, I'm so stupid!"

Cheng Hao laughed at himself, and then turned to stroking the wall and walking in a circle.

Since they use the blinding method, they will touch it little by little, and even if they close their eyes at that time, it will be fine......

After walking about seven meters, Cheng Hao's hand suddenly emptied.

The door has arrived!

Cheng Hao picked up the oil lamp and walked in, unlike the outside, there were mural walls inside, which reminded Cheng Hao of the information given to him by the organization, Tomb No. 3!

Is this really an ancient tomb?

Cheng Hao walked faster and faster, glancing at the mural from time to time, and just as he was about to walk out of the tomb, a strange mural caught his attention. Flying with a dragon? It's just that although it is flying in the sky by dragon, why is there no one? Why does a dragon go to heaven by itself? Isn't he supposed to take the owner of the tomb to heaven?

Cheng Hao has never been able to come up with a reason!

Walking out of the tomb, Cheng Hao finally understood and figured out this matter, this is an ancient tomb, but there are no people inside...... It's the black dragon! That is, the owner of the snake at the entrance of the tomb!

This also explains why the hole where I came in was a place for round animals to enter and exit, because it was dug by the black dragon back then.

And the square at the beginning was the lair of the black dragon.

As for the stone statue that suppressed the snake just now, it should be the official of the Chu State in the mouth of the people!

Cheng Hao figured out what had happened, and couldn't help laughing.

This ancient man is really interesting, after the death of the whole family, he built a tomb for the person!

Glancing around at the surrounding murals, Cheng Hao understood that this was the best time for him to figure out the truth of the matter.

This mural is also an opportunity to understand the secrets of the organization, and Cheng Hao had to push out the tomb again and re-read the mural in detail from beginning to end.

But just after watching it, Cheng Hao already felt crazy.

The reason this great black serpent is called the Black Dragon is because of its ability to immortalize anyone who drinks its blood......