I don't know how many years ago, a spear flew from somewhere.

No one in Liyue saw the spear with their own eyes. They only knew that on that day, the clouds seemed to be cut into two pieces, so distinct.

It crossed the sky, from Qingce Village to Jueyunjian, then to the giant rock abyss, and finally fell into a deep pit.

Mortals failed to discover that silvery light, just like the fire-element deception flower could never climb the snow-capped mountains. That kind of power seemed to be beyond the reach of mortals.

But the immortals saw it.

And they remained silent.

That was in the distant past, existing in the records of the earth's veins, a few generations ago in Liyue Port - and nothing unusual happened after this spear fell into the abyss.

Five hundred years ago, Kanria suffered a huge change, and countless black monsters attacked Liyue.

Before actually attacking Liyue Port, they would pass through the Strata Abyss. While passing through this mine, a few monsters inexplicably broke away from their troops and turned to the other side of the mouth of the abyss.

According to legend, an unknown Yaksha Immortal appeared on the battlefield. He helped stabilize the situation of the retreating Qianyan Army. In the end, he even sacrificed himself and led the monsters into the abyss, where they perished together with them.

However, those monsters that had been inexplicably attracted before did not step into the Yaksha Immortal's trap. They entered the rocky abyss from another corner unknown to people.

Some workers said they occasionally saw strange black marks deep in the mine.

Most people who come forward to touch these black marks will feel abnormal physical discomfort. People with better physical fitness will feel this discomfort more strongly.

Physical discomfort is only the simplest part of the process. If the affected person survives this period, other complications will occur.

The first is mental disorder. Miners will have strong hallucinations, such as treating their surrounding partners as enemies, or treating smooth stones as monsters. This situation depends on the person's situation, and some people will show strong aggression.

Sex, some people will try to run away and hide.

The second is the physical changes.

In the most horrific case on record, a miner uncle who had served in the Qianyan Army touched a black mark and finally ran away and hid for nearly a whole day. When people found him, he had become

There was a kind of monster that was all black and crawling on the ground in a weird posture.

He is very aggressive, but very photophobic. He can't even stand the light of the Lumen Stone, let alone the sun.

And his speed was very fast. In the end, he disappeared into the darkness, and the miners and researchers never saw him again.

——But of course, these are all based on the information left behind. Who knows the real situation.

Maybe the uncle who turned into a monster would have been exterminated long ago, otherwise there would be a monster wandering around the mine at any time, and the miners would not be able to carry out normal work.

After a long period of research, scholars finally figured out a very important thing - there is a solution to these illnesses that cause physical weakness due to contact with black marks, and the method is very simple.

As long as the affected person is brought back to the ground and the sun shines on him, he will be able to recover in less than half an hour.

Of course, if the situation is as serious as that of an uncle, it is not certain whether sunlight can still be effective.

In view of the fact that this disease is somewhat similar to the black monster that invaded Liyue back then, Liyue Seven Stars organized a small investigation, but the Seven Stars of that generation failed to discover anything of value.

And for some reason, this matter was suppressed very quickly, and not even half a file about the investigation was left.

It is said that it was sealed away by a certain generation of Baiyi in the Privy Council. No one else could see the file except him - and that Baiyi had passed away for a hundred years.

Speaking of which, Ningzhe has not been to the Privy Council in person since he took over the position of Acting Baiyi.

There are quite a lot of files in the Privy Council that can only be opened and browsed by Bai Yi. There are many secrets in them. Maybe the files about the mysterious black disease and the investigation are among them.

It's just a pity that he is still observing Yue Song and those treasure thieves.

After twists and turns, Yue Song came to a very secret small cave entrance.

The entire cave entrance was surrounded by some kind of stone fence, and through the gaps, flickering firelight could be vaguely seen inside, which should have been emitted by torches used for lighting.

On the edge of the cave entrance, there is a less conspicuous Night Crow logo - which is the logo of the treasure stealing group.

As soon as Yue Song arrived at this location, he took out a letter that looked a little damaged, and then with a click, the stone fence opened, revealing the road leading inside.

As if hesitating for a moment, Yue Song clutched the letter tightly and then walked into the cave entrance.

The moment he entered the cave entrance, the open stone fence closed again, kicking up some dust as if no one had ever visited here.

"..."

High up, Ningzhe opened his eyes.

It turns out to be hidden here...

With the twists and turns of the road, and the fact that those guys had to use special tools to clear their scent every few steps, it was no wonder that the baby rock dragon lizard couldn't be found at all.

They seemed to have expected that elemental creatures would cause trouble from the very beginning, so they carried specially made alchemical powder that could disrupt the elemental creatures' perception of the surrounding atmosphere.

It seems that there are quite capable alchemists within the treasure-stealing group. Although this kind of prop is not difficult to make, if it is produced on a large scale and distributed individually, it will test the skill of the maker.

But those things were trivial to Ningzhe. As long as he found the specific location, he no longer had to hide in the dark.

Yue Song took out a damaged envelope before going in. Although the letter looked very worn, with only some debris left around it - but if you only looked at the color, you could tell that the letter was made of the latest technology.

In other words, this letter was written not long ago.

Can the captain of the "Qingyuan" be led to this place with just one letter?

So what exactly is the content of this letter... could it be related to Yue Song's younger brother Yue Long? It seems that the Qianyan Army soldier has already entered the mouth of the abyss, and no news has been released yet.

"No matter what, it's time to close the net..."

After murmuring softly, Ningzhe's pupils flashed with a golden light, and then a large number of elemental creatures gathered behind him.

There are crystal butterflies, rock dragon lizards, and giant birds with rock elements...

After his simple mental exploration, although the treasure thieves gathered here, they did not choose to continue digging from here - perhaps because they knew that the structure of the mountain was not stable.

In a sense, this saved their lives...
Chapter completed!