A large blue spar shard, which resembled the Nail of the Cold Sky in the snowy mountains, floated in midair, and pure blue light kept emanating from the hedr.

Underneath the hedron was a crack that seemed to have been torn apart from space, and the crack was now closed, but there was still an ominous aura spreading out of it.

Layers of sealing techniques sealed this rift, and also isolated this space from the real cave space.

A few Fatui were located just outside the rift, and there were quite a few ruins around them, as if they were studying something.

Seeing such a scene, Yelan's eyes were cold, and the blue longbow appeared in her hand, bending the bow and arrows in one go.

The sword condensed by the water struck the Fatui soldiers who were standing next to the rift, measuring something with a prop in their hands.

The soldier sensed the danger, but it was too late, and he watched as the terrifying water arrow came at him, right in the chest.

Jiang Bai didn't do anything yet, but he saw Yelan next to him lose his disguise, and his figure turned into a shadow and rushed towards the other Fatui in the cave.

Jiang Bai really saw her face at this time.

This is a very beautiful woman, but judging from her unobtrusive skills, this is an extremely cold and dangerous woman.

The Fatui soldiers didn't put up much resistance with Ben, and they were all tied up by her with water.

She tugged at the thread that bound them all together, one foot on the shoulder of one of the Fatumi, and her short, sleek hair covering half of her eyes, and she looked at them condescendingly, with a cold look in her eyes.

"This is Liyue's forbidden land, who allowed you to enter?"

A few Fatui did not react at all to this sudden crisis, and they are still a little dazed.

It's true that they've entered a blocked area, but they're really just doing research, and they're not doing anything.

They were also just a research team, and their strength was not strong, so they were easily defeated by Yelan.

"We... Just doing research......" one of them began.

"Huh? I might have believed you a little bit if you had said this before you unleashed the demon gods, but after you had done something like that, and you said such things in such a dangerous place, do you think I would believe it? ”

Yelan directly grabbed the collar of the person who spoke and looked at him indifferently.

"It was done by Childe-sama, and we don't know......"

These Fatui researchers felt that they were very wronged, very wronged, and scolded the unreliable executive in their hearts.

The boss did something but let these innocent soldiers take the blame, but there was no way, who made them all fatui?

The person who spoke had a bitter look on his face, "Our mission is to study the pollution of the pitch black and find other ways to purify it except for the spikes, so we really don't have any bad ideas in the dark......"

Despite the fact that what they are doing is something that benefits all of humanity, they are no longer trusted with the release of the Demon God to wreak havoc on Liyue.

Even if the intentions are good, there are lessons to be learned, and their presence here itself becomes a sin.

"This is a relatively safe place in the pitch-black rift, isolated from the real world by the use of magic circles, and the pollution of the past has been gradually purified over the past five hundred years......"

"Although this rift has not disappeared, and there is still filthy energy escaping from it from time to time, due to the suppression and purification of the spar floating in mid-air, the pollution of this escaping energy is very small, so we can study it here......

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"We really didn't break the seal here, you don't believe you can check it, really!"

Several researchers said one by one, and they all looked bitter.

"I think what they said should be true."

Jiang Bai walked over with the experimental records he found.

The date, process, and data of the experiment are recorded in detail.

Seriously, he was also surprised when he saw this experiment log for filthy energy.

All along, his image of the Fatui is not very good, and he thinks that they will do whatever it takes to achieve their goals, and they are just a bunch of-stirring sticks.

But now, he's really a little bit different.

It turns out that they are not all doing bad things, and occasionally they are still doing some personnel.

Yelan took the experiment log and looked at it at a glance, checking the seal after confirming the authenticity of the above.

There is indeed no sign of the seal being broken, and it is still functioning.

She looked around again, and was relieved to see that the instruments were just some tests.

As long as the seal hasn't been broken, I'm worried about what kind of conspiracy these Fatui are hatching, and Liyue, which has just experienced a catastrophe, can't withstand such a series of tosses.

"Do you know what this floating hedron is? And this rift, how did it come about? What is the filthy energy gushing out of it? ”

Jiang Bai has too many doubts, maybe these Fatui researchers can help him answer some of them.

One of the researchers, who looked older, replied:

"This is a spike fragment descended from Skye, according to our research, this spike can purify these filthy energies, and has a certain repair effect on the rift in Teyvat......"

"Albedo also said that this nail has the energy to purify the energy of filth, it seems that it should be like this......" Jiang Bai thought thoughtfully.

After knowing the history of the snow-capped mountains, he had a hostile attitude towards the spikes that fell from the sky, after all, it was not good intentions to drop spikes to destroy a country.

However, the Nail of the Cold Sky purified the pollution caused by the poisonous blood of the demon dragon a few years later......

It can only be said that there is no good or evil in the object itself, and after all, it still depends on the person or god who uses it behind it.

And using their Sky Island, even if they destroyed the ancient country of Snow Mountain, they also saved countless living beings in other places, and they can't be judged simply by good and evil.

Like the Fatui, while some of their actions can be called sinful, some of them are really saving.

It can only be said that people are complex, an organization is like this, gods are like this, and even the Sky Island far away in the sky is like this.

"What about this rift? How did it come about? ”

This didn't need to be answered by the researcher, Yelan answered his doubt.

"Five hundred years ago, a dark calamity enveloped all countries, and countless terrifying demonic beasts came to our land from these cracks, and the Yuling Tomb was the first to be affected, it was countless ancestors and the lives of the Thousand Rock Army who controlled the situation, and sealed this crack here through the suppression of this spar......

"However, the Tomb has been polluted and can no longer be inhabited, so the Millelith Army can only organize the evacuation of residents and completely seal this place."