Under the control of Xing Shengbin's spell, the bronze coffin that was buried deep underneath was sent up by the soft soil.

The Wudang Earth Escape Technique is so easy to use, and fortunately, the soil here is soft and easy to control, if it is hard geology, with Xing Shengbin's mastery of spells, it may not be able to do this.

Looking at the huge bronze coffin again, Yang Hongda gritted his teeth and said:

"Hey, I want to slap this thing to pieces. ”

Xing Shengbin smiled bitterly and said:

With your strength, you will never be able to smash such a thick piece of copper, let alone smash it, it is difficult for you to leave some traces on this thousand-year-old copper. ”

Yang Hongda didn't believe in evil, took out the long sword, raised his hand and slashed it, the piercing sound of metal rubbing, where the long sword passed, although it left a faint trace, but if it was not very carefully observed, this trace would definitely not be detected.

Looking at the traces, Yang Hongda instantly said like a deflated ball:

"This thousand-year-old bronze is really strong, and I don't think my first-grade sword armor may be able to cut through this old copper. ”

Xing Shengbin smiled and stroked the edge of the passage, stretched out his head to look inside and said:

"This bronze coffin has been changed by the yin qi, before, there must have been a corpse that had undergone corpse transformation, otherwise, this bronze coffin should not have been changed so completely. ”

Yin Qi is a rare thing in the yang world, and things that are eroded by Yin Qi will have different properties change depending on their texture.

The hidden weapons guarding the mausoleum in the passage were also eroded by the yin qi, but the yin qi emitted by the copper coffin was too little, although the texture had changed somewhat, but it was a change after being oxidized by moisture.

The rusty secret weapon is like hard chocolate, and although it is hard, it has lost its proper properties of metal.

There are no more items in the copper coffin, and the inner surface that should have been blue-green has also been corroded to black by the yin qi, which is the most precious thing in the real copper coffin.

The inner wall of this circle of the copper coffin, because it has been sealed for many years, the yin qi has been perfectly integrated with the interior, and the concentration of yin qi on the inner wall of the copper coffin has definitely reached the highest.

The cold environment inside it is the most direct manifestation, just when Xing Shengbin looked at the bronze coffin, a symbol on the pitch-black inner wall caught Xing Shengbin's attention.

The bronze coffin in such a state does not have the height of the three realms and the four realms, and it is too difficult to leave obvious traces on it, and the traces on the inner wall are undoubtedly engraved in it before the burial.

The surface of the inner wall of the black copper coffin made this notch, which should have been clear, not so conspicuous, Xing Shengbin jumped into it with one jump, stretched out his hand to touch the trace, and said at the same time:

"There's a sign here. ”

Yang Hongda also stretched his head over, raised his eyes to look inside and asked:

"What the hell. ”

Xing Shengbin carefully looked at the marks on the inner wall of the black copper coffin, touched his chin, and said:

"I think I've seen this mark. ”

The notation is simple, it is a square of four straight lines, but the four straight lines extend out at each of the four corners where they should be connected to each other.

It's like when you draw a square, you don't draw it well, but you can't erase the extra parts, so you can only take it with you.

Xing Shengbin touched his chin and thought carefully, where had he seen this symbol, although this thing was familiar, but the impression was not very deep, and this symbol was not too peculiar, just four lines.

Yang Hongda also stretched out his head to look at it, and after looking at it for a long time, he said:

"This can't be carved by the people inside! buried alive...... I'll see if there are any marks on the cover. ”

As he spoke, Yang Hongda turned around to look at the lid of the copper coffin that had fallen to the side.

Squatting in the copper coffin, the more Xing Shengbin looked at it, the more familiar he felt, but he couldn't remember it for a while, looking at the imprint, what happened after Xing Shengbin came to this world, just like the fast forward of the movie, went through it all over again.

When he saw the city gate of Mingcheng again, Xing Shengbin saw this familiar mark again.

There are more than a dozen thumb knives in the small wooden box, which were customized by the prince of Qi when he was in Mingcheng at that time, but later with the improvement of the realm, this thumb knife seems to be more and more useless, and can only be kept in the ring.

And this trace is the corner of the bottom of the box in the small wooden box containing the thumb flying knife at that time, but I didn't care too much about it at the time, plus there was a reminder from the companion of the eldest prince of Qi, the box has a mechanism, so I didn't take the traces inside too seriously, but I didn't expect to see it inside the bronze coffin today.

Thinking of this, Xing Shengbin couldn't help but stare at his eyes and inhale a cool breath.

The two won't have anything to do with it, this huge bronze coffin won't have a dark box like that small wooden box!

After rummaging for a long time, Xing Shengbin once again found the small wooden box in the iron bracelet, looking at the mark in the small wooden box, Xing Shengbin confirmed that there was definitely some connection between the two.

Xing Shengbin turned over and walked out of the bronze coffin, greeted Yang Hongda and said:

"Brother, come here, this may be a mechanical coffin, you see~"

As he spoke, he handed the small wooden box in his hand to Yang Hongda, looking at the delicate mechanism of the small wooden box, Yang Hongda couldn't help but sigh:

"This technique is amazing, is this a carpenter's craft! You mean ......?"

Xing Shengbin nodded and said:

"That's right! Let's find it~"

Yang Hongda directly returned the wooden box to Xing Shengbin, squatted and stared at it carefully, and the two of them groped for a long time, but there was no effect.

Yang Hongda squatted on the ground and said:

"Brother, do you have to turn it over, so we can't look for it carefully!"

Xing Shengbin looked at the small wooden box carefully and said:

"Yes, it's the other way around. Come on, I'll get it. ”

Putting away the wooden box, Xing Shengbin once again recited the law and performed the method of earth escape, only to see dozens of tons, or even hundreds of tons of bronze coffins, after falling into the soft ground, they turned around again and floated up.

It's just that because of the problem of self-weight, the outer walls of the bronze coffin on all sides are deeply sunk into the soil.

The two men jumped onto the bronze coffin and began to stare at each other again.

Finally discovered the anomaly, on the side beam at the bottom of the bronze coffin on one side, Xing Shengbin saw a gap that should not exist.

The bronze coffin was too big, and when he was in the dungeon again, he fell heavily on the ground, and before, he didn't know how the Zuo Dao Demon put Tian Qi in, and the copper coffin, which was supposed to be flawless, had a thin and invisible gap.

However, after a few left and right movements, the side beams that should have been able to move did not change at all, which made the two people puzzled.

After working for another half a day, the two finally opened the secret box.

It turns out that this copper coffin is roughly the same as the small wooden box, but one of the four side beams at the bottom is not a whole variable, and one of the side beams has an extra thumb-thick bolt.

This latch is not removed, never want to open the hidden box, as long as the latch is withdrawn, the bottom of the copper coffin that was originally integrated will reappear, similar to the structure of the small wooden box.

The two of them moved the side beams one by one, and finally found a secret that had been sealed for four or five thousand years in one of the bottom corners of the bronze coffin.