Lao Niu and Lao Yan looked relieved, didn't pay more attention at all, and shook their heads to do their own things, as if they were ...... Don't worry at all, you're in control.

Soon, Yeyue understood why Lao Niu and Lao Yan were not afraid that they would sneak away when they were not paying attention.

When they go down, the stone steps pass unimpeded, but now they can only go up to the position of the hundred steps, and they can no longer go there, as if there is an invisible prohibition that forbids them to climb up.

Of course, Night Moon didn't really want to escape at this time, and even if she could escape from this crater, she wouldn't be able to escape from the patrol range of those monsters, silently, and without alarming the monsters at all.

Since she knew that she couldn't do it, why did she bother at this time, it was better to reduce her existence as much as possible, avoid attracting the attention of those old monsters, and wait for the Soul Gathering Tower to open the wooden door to the second floor.

Yeyue felt a hint of confusion. If they are afraid that they will take the opportunity to escape, why do they keep reminding them not to use their brains......? Is there a loophole in the ban that blocks the way to escape? Or is there something else?

Yeyue, who was too lazy to come down from the stone steps, led the evil tiger and found a large cave near the position of the hundred steps, about the width of five people standing together, and the cave was extremely dark.

Even if it comes, it can only be peaceful in a short period of time, and Yeyue is ready to clean up the hole in this rock wall according to the explanation of the old cow and the old salt.

"Smack!"

A flint stone that was used to replace the earth fire fell in the cave, and the firelight instantly illuminated the entire cave, and the dim and mottled patterns on the stone wall were also presented in front of the two of them at this moment.

Yeyue looked at the patterns on the stone wall with some surprise, the mottled patterns were not stone paintings, nor did they belong to totems or the like, at first glance, it looked like meaningless lines, entangled around the stone wall.

"Master, there's a little hole in it. The tiger, who was completely uninterested in the patterns on the wall, kicked away the gravel at his feet and pointed to the innermost stone wall.

The stone cave is not deep, only seven or eight zhang deep.

Night Moon looked at the place pointed by the tiger, and there was indeed a small hole only two fingers wide, embedded in the innermost stone wall.

Standing at the entrance of the cave, she could vaguely feel that there was a flowing wind coming from the small hole.

Then, in several nearby stone caves, similar and seemingly meaningless patterns can be seen, as well as a hole within a hole.

The first thing that came to Yeyue's mind was the vents, but why did the crater of an extinct volcano need vents?

If it's not the vents, what are those little holes?

The patterns on the walls of the cave seem to be useless and meaningless, but Yeyue believes that if such a stone cave is really meaningless and useless, Lao Niu and Lao Yan will not solemnly order them to clean up the gravel and weeds at each cave entrance.

The Evil Tiger, who followed closely behind Yeyue, said puzzledly: "There is only a bunch of messy lines on the stone wall, and it can't even be called a formation, I really don't understand, why do those monsters deliberately clean up these stone caves." ”

Night Moon was equally puzzled.

"Maybe it's because of our low cultivation and shallow knowledge, so we can't see the use, okay, let's clean up these holes first. ”

began to clean up, and Yeyue realized that this seemingly undifficult job was actually not simple.

The gravel in the hole, the small one, only about the size of a thumb, is a very simple gravel block, and it is cleaned up as dust by sweeping it away, and the big one is about the size of an adult's fist, but its weight is disproportionate to its volume, and it weighs more than 100 catties, and it cannot be easily shattered.

It's no wonder that the old cows and old salts, who don't have the support of cultivation, feel that time is tight, but the stones are not light, and it takes a lot of time and effort just to move them.

It's no wonder that in the face of the requirement to pair up with the tiger, Lao Niu and Lao Yan don't care much.

This situation naturally aroused Yeyue's curiosity about these fist-sized rocks, and the lonely grass scattered around the edge of the cave also caught her attention.

"It's certainly not an ordinary stone, smash it open and see. ”

The Tiger first smashed down with a punch, and the fist-sized stone actually only rolled a few times, and it didn't collapse at all due to the heavy blow, which made Yeyue even more sure of his guess.

Since his fist couldn't break the fist-sized stone, the tiger swung his axe from his storage bag and slashed down at the stone.

"Click!"

The edge of the stone shattered a small piece, and Night Moon couldn't help but exclaim in surprise when she saw the purple spar with white silk like clouds and mist coming out from the peeling place.

"It's actually purple dolomite. ”

For Yeyue, the purple marble was not of much use, but she still knew its value. Purple marble is a rare refining material on the market, and it is also the best material to improve the hardness of spiritual weapons and magic weapons in the minds of many refiners.

Now that this rare and highly valuable purple cloud stone was treated as useless gravel by Lao Niu and Lao Yan, Ye Yue naturally unceremoniously put it into his storage bag, keeping it for a chance to sell in the future, in exchange for spirit stones or necessary cultivation resources.

Attention shifted to the sparse weeds, but unfortunately those weeds were really just weeds, and they were of no use at all, so they were naturally uprooted.

With the income of Ziyunshi, the depressed mood of becoming a monster prisoner is finally a little better, and the speed of cleaning the stone cave is naturally higher.

At the end of the day, Yeyue and the Tiger cleaned up more than ten stone caves of similar size, during which Lao Yan also came to inspect once, and after confirming that the two had cleaned up the stone caves well, they left with confidence after a few words, as for the gravel and stones that should be cleaned away, they didn't care at all, and they didn't even have the meaning of asking.

More than ten stone caves were cleaned up, and Yeyue harvested a total of nearly thirty purple cloud stones, as well as three pieces of black domain gold that exuded a faint demonic energy, as well as two red baby grasses that were accidentally discovered.

With such a harvest, Yeyue was extremely happy, this is a lot of income, but the more income, the more doubts Yeyue felt in her heart.

Where did these purple marble and black domain gold come from? Every stone containing purple marble and black domain gold was at least the size of a fist, or even the size of a human head, but there was no sign of collapse anywhere on the rock wall of each stone cave except for those chaotic patterns, as if these stones were extra out of thin air.

It is not difficult to understand that there is a spirit grass.

In the next few days, in addition to resting, Yeyue and the Tiger spent most of their time in the process of cleaning up the stone cave.

Until Lao Niu and Lao Yan appeared in front of the two again.

Lao Niu looked at the cleaned stone cave and nodded with satisfaction, "It seems that it is not a passive slack off and pretend to help, very good." ”

Old Yan waved his hand, "This place will be closed in a few days, you have to speed up again and clean up the remaining caves." ”

Satisfied with the sincere cooperation of the two, Lao Yan kindly reminded the two again, "If you don't want to die unclear, except for gravel and weeds, don't touch anything else, especially those patterns on the stone wall." ”

Lao Yan's kind reminder made Yeyue even more curious about those patterns, but unfortunately, no matter how curious she was, no matter how carefully she looked at them, those patterns were still just messy and meaningless lines in Yeyue's eyes.

Just when the night moon didn't know how many times she stood in front of those patterns in a daze, suddenly

"Boom, boom!"

"Buzz ......"

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