I changed the timeline with the game.

Chapter 1135 Interim Mission: The Secret of the Earthsea's Submersion

Beyond the thick glass on one side of the narrow deep-sea chamber:

Those were rusted chains strong enough to pierce the sky and the boundless abyss within this tilted space.

It lies like a sleeping dragon curled up in the abyss, each iron clasp covered with dark red rust, like bones gnawed by time.

These ancient shackles extend vertically upwards from the bottom of the Kuroshio Current, casting distorted shadows in the viscous, ink-like water.

Iron filings peeling off the surface of the chains floated and sank with the undercurrent, like countless tiny stars falling into the eternal night.

Although Su Wen already knew what it represented, as Chie's gaze climbed along the chains, she eventually discovered those structures that transcended physics and didn't even stop at the water's surface.
Instead, it continued to pierce through the surging black tide.
They have even woven into a web in the invisible void.

The rusted chains became transparent higher up, like a ladder stretched by some force, before finally disappearing into the mist-shrouded sky.

Compared to [Deep Tokyo].

here:

Perhaps this is the legacy left by the deceased civilization 'Utopia-Cephidaros' that Caroline told her about not long ago.

That should have been a place where stars twinkled.
At this moment, however, it was completely obscured by a cage woven from chains, forming a barrier that even moonlight could not penetrate.

Did the great sage ultimately go down the wrong path, or did he reach the future he envisioned?

Su Wen did not yet know the answer, but silently patted his chest and then nodded slightly towards the chain that pierced the sky and the black tide.

Then,

The handsome scholar then heard a metallic hum coming from the depths of the tide, the chains swaying slightly under some supernatural force.

Perhaps because of their connection to the divine abominations, these thin black tides seem to possess life of their own.

But as the dark waves surged, faintly visible glowing runes could be seen flickering in Su Wen's deep blue [Appraisal Vision]. Whenever the chains swayed, the runes would light up and then go out, as rhythmically as breathing.

Use the freeze-frame screenshot function.

He meticulously recorded the traces of those runes.

But everything vanished swiftly, except for the rusted chains that eternally pointed to the sky, recording some ancient, sealed-away pact.

Su Wen had seen this scene before in [Deep Tokyo], but he had never felt the overwhelming awe so vividly.

Indeed, perhaps those crimson cyber towers that stretch across the heavens and earth are merely chains that the Web Weavers attempt to corrupt by implanting memes.

But just as he happened to think of this.

The deep-sea capsule beneath their feet seemed to have landed with a resounding crash.
With a muffled thud, Xiaoqianhui stumbled and nearly fell into the cabin, while Suwen looked out through the glass window:
He saw that only the deep-diving rope remained hanging above his head, with the other end pointing towards the distant present world.

It was completely dark here.
But it seemed as if we had reached the end of this deep dive.

As for the only light in the distance before them, it turned out to be a huge subway train rushing towards them with its horn blaring.

"careful!"

Su Wen kicked open the outer door of the deep-sea cabin, then decisively pulled Natsume Chie and leaped away into the distance, barely avoiding being run over by the oncoming subway.

Faced with such a terrifying scene, the little girl was almost paralyzed with fear:

"teacher,

Why are there still things like this underground?

"Shouldn't we have already left Tokyo?"

Clearly, she had diligently studied the materials Caroline had provided. But for someone already enveloped in psychic energy, that knowledge was utterly insignificant.

"This is the [Border], the place where the Black Tide meets the real world."

So from a certain perspective, this is still Tokyo.
But—[Post-Destruction Tokyo]

Therefore, I am more inclined to believe that the entire Tokyo subway system has been submerged by the Kuroshio Current.

That's right,

The resurrected civilization, which he was not entirely certain about, might have already begun its plan to engulf Tokyo.

And his answer suddenly appeared in the deep blue field of vision for identification:
[Unstable Frontier: Tokyo Rift - The Nest of the Earth's Veins]

Nest? Su Wen was somewhat puzzled by this term, yet it seemed as if he suddenly realized something.

But after hearing him say that, Natsume Chie finally added softly after a moment of silence:
"teacher.

My grandfather was a subway engineer, so he also contributed to the construction of this place.

But due to a major mistake he made in the past, he became completely disabled, and his father also died in that disaster.

Many people believed that their actions were a major mistake, so our family stopped living in Tokyo and moved to the suburbs.
I was only six years old then.

So I don't know exactly what happened.

Even so, on his deathbed, my grandfather still believed he had done nothing wrong.

"What do you think?"

Chie Natsume gazed at the deep, dilapidated subway tracks before her, bathed in dim light.
She said softly:
“I was bullied because of what they did, and my mother was unable to afford medical treatment due to huge debts. I did hate them at one time.”

But I hate those who bully even more.

I hate my own incompetence even more. If I had done a little better, wouldn't everyone have been less upset?

And upon hearing her say that
Su Wen probably understood why the little girl wanted to commit suicide when he first met her.

This also made me realize once again that the [Time Travel System] does not set the initial location next to someone who is completely unrelated to you.

It seems that besides the "spirit medium lineage," Natsume Chie may have also left some clues behind by her grandfather.

So he simply placed his hand gently on the top of her head:
"Don't put too much pressure on yourself. There are many things that a young girl like you shouldn't have to bear."

correct,

Did he say anything before he left?

He said there was a huge secret inside the Tokyo Metropolitan Subway system.

Therefore, construction can no longer continue.
Absolutely not.

Do you remember that secret location?

"At Asakusa Station, in a secluded corner, he said he left the mark of the Yata no Kagami there."

instantly,

The system notification that hadn't been used for a long time suddenly appeared before Su Wen's eyes:

Congratulations, great Chief Player!

You have successfully completed the A-rank hidden mission: The Sinking Tokyo.

You have successfully completed the interim quest: The Secret of the Submerged Earthsea.

So, in that case...
Chie Natsume's grandfather passed away not long ago; could it be for a similar reason?

Su Wen has always thought things through quite deeply.

But looking at the Tokyo subway tracks that were beginning to show signs of disarray in front of him, even he felt a little helpless.

Even if one were to exhaust all their stored influence in the multi-dimensional world, it would be impossible to cover the entire Tokyo metropolis with [Appraisal] if they wanted to directly obtain all the holographic images.

This is an impossible plan 1.

and so.

"Caroline, could you help me hack into most of the subway cameras in Tokyo?"

I need to export the corresponding video information.

But compared to his request in the Dawn System, the witch's playful words surprisingly contained a hint of rebuttal:

"Tsk tsk tsk,"

Do you take me for real artificial intelligence?

I'm not like that.

(End of this chapter)