Senior Brother Geng frowned. He pondered for a while and said to me again: "We have to dig out this brick."

The stone bricks were originally loose and it was not difficult to dig them up. Senior Brother Geng and I used an engineer shovel to insert the gap between the stone bricks. Once we pried it hard, the stone bricks fell off the wall.

On the other side of the brick is a very deep groove. I took a lantern and saw a metal box and a stone ball placed at the bottom of the groove.

I didn't know if these two things could be touched, so I stood aside and asked Senior Brother Geng to come to the groove.

Senior Brother Geng hesitated for a moment, but he still reached out to drag the box at the bottom of the groove. The box was a bit heavy. Senior Brother Geng couldn't hold it with one hand, and then stretched out his hands before dragging it out.

He first weighed the box, and I heard a "slam" sound from the box. After opening the box, there were eight narrow keys inside. At the end of the key, there was a round cake the size of a fingernail, with a small seal script engraved on it.

Senior Brother Geng took out the keys and carefully looked at them one by one, and said, "Wind, live, hurt, Du, Jing, die, shocked, open..."

As he spoke, he fell into deep thought again. After a while, he stood up again, reached into the groove on the wall, and pulled the stone ball at the bottom of the groove.

I held up the lantern and saw that there seemed to be a very thin chain behind the stone, but the light was too dark and it was not clear to see clearly.

Senior Brother Geng grabbed the stone ball and pulled it out of the groove. Then he heard a "click" sound from the wall. After this sound appeared, the stone ball seemed to be subjected to a directional pulling force from the inside of the wall, and quickly retreated into the groove. Senior Brother Geng's fingers were no longer enough to grasp the stone ball, and he immediately took off his hand.

When the stone ball completely retreated to the bottom of the groove, there was another click on the other side of the wall. After that, I felt the stone wall swaying slightly twice.

While Senior Brother Geng and I were tossing on the wall, Liu Shangang and the others watched from behind.

As soon as the wall shook, Liu Shangang asked nervously: "What's wrong? Why is this? Why is the wall shaking?"

As soon as he spoke, a "swish" noise came from outside the tomb. The sound sounded like the friction of a stone wall sliding on the ground.

Senior Brother Geng listened carefully for a while and said to me: "The sound came from the back hall, and the hall gate was already open."

I didn't hesitate, and immediately left the tomb with a lantern. Before leaving, Senior Brother Geng hugged the box containing the keys in his arms.

As soon as I left the tomb door, I could smell a very heavy smell of mold, which made Liu Shangang measure the air. The pointer on the instrument had deflected to the junction of the yellow area and the red area. Everyone brought their masks and then walked forward.

We first walked along the stone wall covered with reliefs, and then followed the wall nailed with round nails, while walking, we looked for the entrance to the back hall.

Soon, we found a door on this wall. To be precise, it should be a gap. We saw that six bricks were missing on the wall, forming a rectangular door hole more than two meters high. I used a fox fire lantern to shoot it inside. On the other side of the door hole was a large dark space, and there were traces of friction on the stone slab directly below the entrance of the hole.

I felt carefully that there was no sign of the yang energy in the door opening, and this place was still not the main tomb chamber that suppressed the Iron Dragon King.

Senior Brother Geng also looked inside, frowned and said, "It should be the back hall inside, be careful."

I nodded, held the lantern and entered the door. Not long after walking, I saw a thick layer of fish scale-like thin slices piled on the ground. These thin slices were very tough and felt very solid when I stepped on them, just like I was stepping on a thick layer of cowhide.

Some of the thin slices are already moldy and hairy, and the moldy smell I just smelled should be emitted from it. Now I wear a mask and can't smell that smell.

Liang Houzai said that these scales may have been shedded from the Iron Dragon King.

I agree with him that even if we are not in the main tomb chamber, we should be not far from the main tomb chamber.

The deeper the deeper the scales on the ground became thicker and thicker. The fox fire had illuminated the deepest stone wall in the tomb. Near the stone wall, the scales accumulated into a hill more than half a person tall. New scales slid down from the top of the hill, and the scales at the bottom were some moldy.

Senior Brother Geng pointed to the hill with the scales and said to me: "Dig it open and take a look."

Everyone took out the engineer shovel and leaned over to them, quickly dug the hill open. At the bottom of the pile of scales, there was a black sarcophagus with open covers. When we dug it out, the scales were squeezed out along the mouth of the coffin.

Senior Brother Geng grabbed a piece of scale and looked carefully, saying that the Iron Dragon King must be under the black sarcophagus, and asked us to clean up the scales in the coffin as well.

In fact, before he said these words, we had already started to clean the scales in the coffin. As the scales in the coffin became fewer and fewer, I became more and more nervous. I looked at Luo Fei from time to time. She was still a little weak now, and I don’t know if she could successfully set up the Yin-Yang Array after seeing the Iron Dragon King.

Last time when the Bronze Tomb suppressed Zhu Huai, Liang Houzai said that the Yin-Yang Array that Luo Fei and I arranged was more powerful than the one that Master and Master arranged back then. At that time, I fell into a coma, and I don’t know how true or false Liang Houzai’s words were. But I knew very well that when Luo Fei and I arranged the Yin-Yang Array, we could not let the Qi field of the formation penetrate the rock layer like Master and Master back then, and directly suppress the corpse dragon sleeping on the bottom of the tomb.

I don’t know if it was because Luo Fei had too few soul-summoning banners in his hand that the Yin and Yang array could not achieve such penetration power.

Only when I arrived in front of the Iron Dragon King can Luo Fei’s Yin-Yang Formation work, which is indeed a very troublesome thing.

After a lot of time, we finally cleaned up the scales in the coffin almost, and at the bottom of the coffin, a locked black stone door suddenly appeared.

The material of the door is the same as the black sarcophagus, and it is also made of rootless stone. A three-finger-wide gap is revealed between the two door panels, and scales emerge from here.

Senior Brother Geng lay in the coffin and carefully looked at the huge lock. I stood beside him with a lantern. I could see at a glance that the lock body was also made of rootless stone. There were keyholes on the six sides of the lock, two on both sides, and one on the other four sides, which corresponded to the number of keys found in the left side hall before.

"Youdao, take the box over," Senior Brother Geng stared at the lock, and said to me without turning his head: "Put in a little lantern."

I put the box containing the key to Senior Brother Geng's right hand, and then continued the fox fire lantern into the coffin. Under the flames, I saw that Senior Brother Geng's forehead was covered with sweat.

He took out a key from the box and kept saying, "Jingmen, Jingmen, this should be Jingmen, here... it is Xiumen."

While speaking, he stabbed the car key in his hand into the keyhole on the left side of the lock, and carefully turned the key. A light sound came from the lock. Senior Brother Geng breathed a sigh of relief and said to himself: "It's good that I guessed it right. This lock is indeed a structure that reverses the universe. Jing and Du are facing the open, life is to die, injury is to be shocked, and it is impossible to be wrong."

Senior Brother Geng poked eight keys into the keyhole in turn. Every time he twisted the key, a slight "click" sound came from the lock. When the eighth key was twisted, I clearly heard a "clang" sound from the lock, which seemed to be the sound made when the spring was bouncing.

"It's open!" Senior Brother Geng shouted softly and removed the lock from the Black Stone Door.

When he came out of the coffin, Liang Houzai and I grabbed a door panel on the left and right, and at the same time, we used force, and the black stone slab was immediately pulled open, and a heavy yang energy rushed out of the underground secret passage.

I didn't expect the yang energy to come so quickly, and I suddenly became nervous and quickly pulled out the green steel sword, making the sword tip point directly to the entrance of the secret passage.

Liang Houzai also took a few steps back quickly, holding the golden bone in one hand and taking out the evil-proof talisman with the other hand.

No one dared to act rashly and stared at the black sarcophagus vigilantly. As time went by, the yang energy spread throughout the tomb, but its concentration stopped changing when it increased to a certain level, and the Iron Dragon King did not come out along the secret passage.

I leaned over to the coffin, held the coffin with both hands, and looked carefully into the secret passage. In addition to a large number of scales, there were also some floating spots of light, which looked like fireflies flying in the air.

The brightness of each light spot is similar to the fox fire lantern I hold in my hand at this moment, but strangely, there was a gap in the black stone door just now, but the light did not show up.

Liang Houzai put his finger on the button of the mask and asked me in a low voice: "Go down?"

I nodded, turned over the coffin, and jumped into the secret passage.

This secret passage extends downward slanted, and layers of scales are piled up on the ramp. My feet stepped on it and immediately slid down the scales for a distance. I quickly reached out to grab the outer edge of the secret passage to stand firm.

"Slide carefully." I said without looking back, and then slowly slid down the scales.

While sliding down, I held up the fox fire lantern and found that the light spots floating in the air were really fireflies. Among the scales on the ground, there were many arthropod-like larvae.

Xian'er followed me, and he also saw the larvae and said to me: "These larvae feed on scales. It seems that these fireflies have reproduced here for many generations."

Soon I slid to the bottom of the ramp, and right in front of it was a deep corridor that extended straightly. Our arrival disturbed the fireflies lying on the wall. In an instant, the halo in the corridor flashed.

Each firefly emits a cool blue light, but if I remember correctly, shouldn't the firefly's light be yellow-green?

Xian'er approached me and took a quick move. The empty palm grabbed the fireflies. She pinched the wings of the insects and raised the glowing belly in front of me, saying to me: "They have been mutated by the influence of the yang energy here for generations."

I asked Xian'er: "Are these insects harmful?"

Xian'er blew away the fireflies between her fingers in one breath, curled her lips and said, "It shouldn't be, what can such a small bug do?"

I returned the Fox Fire Lantern to her, looked back, and then continued to move forward after everyone was down.

In addition to the scales piled up all over the ground and the fireflies in the air, there were only two bare stone walls left in the corridor. I carefully observed the stone walls on both sides with the cold blue firefly light. It seemed to be formed in one piece. There was no gap between the stone bricks on the wall. Not only on the left and right sides, but also on the arches and the ground occasionally exposed from the scales.

After walking in the corridor for a long time, I was worried that there was not enough purifier in the mask, so I stopped and turned around and asked Liu Shangang: "Do you change the spare medicine now?"

Liu Shangang only said one word: "No..."

It should be said that I only heard this word, and he said something later, but it was completely covered by the sound from the depths of the corridor.
Chapter completed!