Who told him to make the cards!

A giant drilling rig is placed in the very center of the ground.

It has stopped working.

But there were wisps of heat mixed in with the air.

This indicates that the body still has residual heat, and the temperature is not low.

The sixth floor is so cold. If this drilling rig stopped when the mine accident happened half a month ago, how could it still feel warm now?

Ding Mao never uttered a single truth.

Chen Zhi jumped down from the hole with the light card in his hand and came to the drilling rig.

The lights illuminated vast expanses of crystal-clear mineral clusters, making one feel as if they were in a coral reef in the deep sea, a truly beautiful sight.

"Miss Shen, we've arrived."

Chen Zhi clapped his hands and said.

Chapter 7 Boundary Crystal

The ore that Chen Zhi placed in the iron box came from this source.

Transparent columnar crystals grow densely on the ground and on the walls, with beautiful blue flocculent patterns floating inside.

This is "Liuqing Stone".

The minerals required to forge white cards of natural elements of tier three or higher.

It can also be used to make "caramel".

The green fluff inside the stone represents "wind." After being extracted and refined through a precise process, it is processed into ink, becoming the "Green Law Ink," an essential element for depicting or guiding the wind element in cards.

The value of the flowing bluestone far exceeds that of the white marrow sand and obsidian produced in the past from Well No. 13.

And that's not the most important thing.

Upon closer inspection, one can see that the flocculent patterns within these flowing bluestones resemble clusters of flames being blown by the wind, all drifting in the same direction, seemingly drawn by an unseen force.

Looking in that direction, in front of the giant drilling rig, there was a cluster of rhomboid crystals about one meter tall, noticeably taller than the other crystal clusters.

Its interior has no green fluff, but rather a ring of faint ripples, with an extremely tiny black dot in the very center, fading towards the outer edges, like a miniature black hole drawn with a pen.

"This is... a boundary crystal?"

"It really is a Boundary Crystal!"

Liu Bai gasped in surprise, nearly losing his composure.

Chen Zhi tilted his head and asked, "What is a boundary crystal?"

When he came here before, he could tell at a glance that this crystal was unusual, but unfortunately, he was not well-educated and could not recognize it.

Shen Qinglian's eyes flickered slightly as she said, "A precious mineral that could kill Ding Mao ten thousand times over."

It can bear all the laws and principles related to space and is the core material for aerospace technologies such as high-level field cards, storage cards, and large airborne vehicles.

If sold, the money from a fist-sized pure dimensional crystal could buy more than ten luxury homes.

Its impact on geological formations is greater than its value.

Imperial law explicitly stipulates that once boundary crystals are discovered in any mining area, mining must be stopped immediately and reported to the Papal Court of Mines and relevant safety agencies.

Because mining this mineral destroys more than just a few rocks in terms of physical form; it also takes away the legal principles that support the stability of a large area of ​​land and space nearby.

According to the standard procedure, mining boundary crystals requires first confirming the crystal size, then driving five to thirty obsidian stakes around the vein as needed, and finally having a qualified lawyer establish a stable field before construction can officially begin.

Throughout the entire process, every 25 centimeters of inward advance or every 1 centimeter of movement of the boundary crystal, it is necessary to stop and check whether the legal gap in this area has been filled in time, until the mining is completed.

Since boundary crystals mostly grow underground, the difficulty of operation is greatly increased, making the mining of boundary crystals a huge project comparable to building warships.

There wasn't a single obsidian stake in the mining chamber before us.

Not to mention reporting it to higher authorities.

"So this is what you're really looking for?" Chen Zhi noticed the strange look in the girl's eyes and asked, "Is investigating the mine disaster just a cover?"

Shen Qinglian did not deny it, but only said, "These two things are not contradictory."

Ten days ago, Qinggong Academy received an anonymous sample.

Test results indicate that boundary crystals may exist in the Heishi mining area.

The boundary crystal is often surrounded by high-grade element minerals such as lapis lazuli and flame soil.

Therefore, when Shen Qinglian saw the stone in Chen Zhi's iron box, she knew that this mining disaster was not so simple.

Asking Ding Mao to help find a guide was her way of testing him.

Shen Qinglian looked at Liu Bai and nodded to him.

The latter immediately went to the drilling rig, took out a card from the book, and stuck it on the drilling rig.

A series of numbers appeared on the card.

"HS-325-1431".

"It's confirmed to be a drilling rig from the Black Stone mining area," Liu Bai said. "And it has been illegally modified."

"I can't find the numbers for the overload limit and alarm array; they must have been removed."

Upon hearing this, Chen Zhi couldn't help but look at the drilling rig.

The largest drill bit has a few minor cracks, but it is still barely intact.

Several of the small auxiliary drill bits around the perimeter were missing.

The one Liu Bai found on the road should be one of them.

The ins and outs of the mine disaster that happened half a month ago are now quite clear.

In order to increase the mining speed, Ding Mao had the safety restrictions on the drilling rig removed.

The high-speed rotating drill bit damaged the rock strata, causing the boundary crystals to deviate from their original positions. This resulted in the collapse of the legal structure in the No. 13 well area, causing the mine tunnels to become disordered and shifted. As a result, the miners were trapped on the sixth level and had to find another way out.

Coincidentally, this relocation connected one of the only two passageways in the six-layer mining area to the secret mining chamber for boundary crystals. The miners mistakenly entered the chamber and were tragically murdered.

The so-called legal revitalization is merely a pretext to cover up the illegal mining of boundary crystals.

"Record it truthfully." Shen Qinglian's voice was terrifyingly cold.

Liu Bai took out three new record cards and recorded everything, including the boundary crystal, the giant drilling machine, and the flowing bluestone, into the cards.

Luo Xiao stood behind them and suddenly sighed.

"Manager Ding is right, you really shouldn't have come."

Throughout the entire incident, he never showed any surprise, indicating that he was also one of the people who knew about it.

Luo Xiao used his thumb to open the card slot.

Three cards popped up at the same time.

The first card transformed into a stream of light and wrapped around his ankle.

The second card scattered like scales, quickly covering his body.

The third card condensed into a long spear in his hand, radiating a cold light.

The whole process took less than a second.

"It can activate three cards instantly, so it's Tier 3?" Chen Zhi pondered to himself.

Luo Xiao stomped his foot, and cracks appeared in the ground.

He leaped into the air, his figure moving with incredible speed, heading straight for Shen Qinglian.

A spiral pattern appeared on the tip of the spear, and wherever it passed, the air was shredded into pieces.

Chen Zhi and Shen Qinglian were standing very close, and for a moment they couldn't tell who Luo Xiao was trying to do. They quickly stepped in front of each other to protect the girl.

Shen Qinglian: "..."

The girl glanced at him but didn't move.

The old servant didn't move either.

The old man showed no intention of activating the card, and didn't even lower his hands from behind his back. He just watched Luo Xiao with a cheerful expression, as if he were watching a clown.

Luo Xiao also observed the old servant.

As we all know, a combination of an old person and a young person is never simple.

Some people may look like servants, old and frail, even struggling to speak, but if they really lay a hand on you, they could slap you to the ground so hard you can't get up.

That old servant is definitely a ruthless character.

Chen Zhi thought so too.

Furthermore, this Miss Shen is not stupid; she could easily see that Luo Xiao was sent by Ding Mao to monitor them and silence them if necessary.

Previously on the mining platform, Chen Zhi deliberately divided everyone into two groups to create an opportunity for Lao Pu to kill Luo Xiao.

Nothing happened, which is why Chen Zhi was disappointed.

That's why Luo Xiao kept his eyes on the old servant from beginning to end, including at this very moment.