The rest of the diary mostly described Orobas's research in this place.
Here, he verified many things.
For example, above is below.
"The sky is false. Likewise, the starry sky is also false. The so-called constellations are actually omens of fate reflected through the Ley Lines. Perhaps we are nothing more than toys in someone else's eyes."
"Everything is a fixed existence."
"So, is my fate predetermined as well?"
At this point in the diary, Orobas had fallen into self-reflection.
Little did he know that the moment he left Teyvat, he had already escaped those restrictions.
The later entries continued.
Orobas studied the Ley Lines, and after careful exploration, he made a shocking discovery.
"The Ley Lines can not only transmit power and contain elemental energy, they also record memories!"
"What a shocking discovery!"
"My heavens, if this deduction is correct..."
"Wouldn't modifying the Ley Lines allow one to alter the memories of the entire world of Teyvat?"
"At the same time, I have another question."
"If memories can be altered, then the Heavenly Principles should be someone who does not fear such power, right?"
"And I have yet another question."
"If, and I mean if..."
"We extract the memories stored within the Ley Lines and pour them into a body, then can that person, possessing those memories, be considered alive?"
As Su Han read the diary, he felt that Orobas truly was extraordinary.
Had he not chosen death himself, his future achievements would likely have been astonishing.
Opening the next volume, the story in the diary abruptly came to an end.
That was because Orobas had discovered a strange place somewhere, which he called the Land of the Vishaps.
The coordinates were extremely clear.
As long as one followed Orobas's method of determining directions, Su Han would definitely be able to find Enkanomiya, and returning home would be effortless.
However, he thought of another question.
"Can the coordinates Zhongli gave me also be used here?"
Su Han took out that coordinate marker.
The previously dim crystal now shone brightly.
Moreover, the coordinate point inside it was also located within this Dark Sea Beyond.
"As expected. In that case, I might as well check out what exists at those coordinates first..."
Su Han turned toward the little black coal ball.
Seeing it still holding the diary, he urged it.
"Hey, time to go."
"Yes, Ancestor."
The little black coal ball quickly put away the diaries.
Su Han frowned.
"What are you doing?"
"Collecting information. Since I'm your follower, I have to show some initiative."
Though tiny in size, the little black coal ball possessed tremendous strength and even spatial abilities.
It stuffed a huge number of diaries into its arms all at once.
Su Han reminded it,
"Don't claim a status you don't have. You're neither my follower nor my grandson. Your identity remains unknown. Before I find a way out, you'd better give me a reasonable explanation."
He had no intention of bringing a ticking bomb back to Teyvat.
After all, there were already plenty of matters waiting for him there.
Su Han had no desire to create more trouble.
The little black coal ball froze before finally realizing something.
It had not earned the trust of this powerful figure at all.
Immediately, panic filled it.
It hurriedly flew beside Su Han and pleaded desperately.
"Ancestor, I really can't remember anything."
"That has nothing to do with me."
Su Han's attitude was ice-cold.
He would never place his entire homeland in danger because of an unknown existence.
The little black coal ball panicked.
It did not want to remain in this place, nor did it want to die.
"Ancestor, then what do you want to do?"
The little black coal ball was out of options.
All it could do was look pitifully at the one holding all the initiative.
Su Han calmly replied,
"That's a question you should ask yourself."
The atmosphere instantly became tense again.
The little black coal ball had no idea what to do.
In truth, it understood.
If it chose to leave now, the person before it probably would not stop it.
The problem was, where could it possibly go after leaving?
The little black coal ball fell silent.
"Is there really no other way?"
"There is."
Su Han's answer immediately brightened its eyes.
But before it could celebrate, he revealed the solution.
"You and I will establish a soul contract. If one day you betray me or violate the agreement, your soul will be destroyed completely."
"Do we really have to be this ruthless?"
"I never forced you."
Su Han spoke matter-of-factly.
He wasn't forcing the other party at all.
If it didn't want to agree, it could leave.
He would lose nothing.
The little black coal ball wanted to leave outright.
Yet it also understood that once it departed, it would most likely wander endlessly through this darkness.
If lucky, it might enter the Third World.
If unlucky, it would certainly be devoured by the Abyss.
After much hesitation, the little black coal ball finally agreed to Su Han's conditions.
"Ancestor, meeting you has really brought me terrible luck. Tell me what to do."
"Simple. Three conditions."
"I'm listening..."
Since it had already accepted its fate, the little black coal ball naturally wanted to hear them first.
"Condition one: You must be absolutely loyal to me and must never scheme against or harm me or my family."
"Condition two: You are not allowed to damage the world of Teyvat."
The conditions Su Han proposed were actually quite lenient.
The little black coal ball had expected him to demand lifelong servitude.
If these were the terms, it certainly had no objections.
"Ancestor, you're really good to me. I agree."
"Not agree. Swear it through a soul contract."
What use was an ordinary oath?
Only a contract formed at the soul level possessed true binding force.
Su Han had learned this from Zhongli.
Even gods had to fulfill soul oaths once made.
Otherwise, they would suffer backlash upon their souls.
Of course, Su Han had also asked whether such contracts could be broken.
Zhongli's answer had been simple.
Yes.
But even if the contract was broken, the resulting backlash would still be devastating.
The little black coal ball nodded repeatedly.
"Of course. Of course."
This was no time to play dumb.
After all, neither of them was an idiot.
Anyone who knew so much about the Second World certainly understood the significance of soul oaths.
It knew very well that if it had refused just now, this Ancestor would likely have drawn his blade.
"I swear upon my soul that I will never harm my master, his friends, or his family. I will also never harm the Third World."
"I offer my soul as the pledge. Should I ever break this oath, I shall suffer eternal doom, and my soul shall completely disintegrate."
As the little black coal ball swore its oath, golden characters branded themselves onto its forehead.
This was a soul oath.
From this day onward, if it dared violate its promise, the curse would activate immediately.
Once everything was completed, the little black coal ball immediately approached Su Han with a flattering smile.
"Master, can you tell me more about the person in that diary and the Third World now? Maybe I can help analyze things for you. Don't let my dark appearance fool you, I'm actually very smart..."
"Heh. I couldn't tell."
Su Han's face was filled with disdain.
If it were truly smart, would it have been sealed inside a book?
He certainly didn't believe so.
However, the little black coal ball argued stubbornly.
"How would you know if you don't try?"
"The main issue is that there's no need. No one understands Orobas's past and present better than I do."
"Huh?"
The little black coal ball was utterly shocked.
This master had supposedly never been here before, so how did he know Orobas's story?
Seeing its disbelief, Su Han began recounting Orobas's tale. They had plenty of time while traveling anyway.
"So when this god encountered the truth of the world, the rulers of Celestia came looking for him..."
"What a tragic fellow. I'm almost moved to tears."
The little black coal ball commented with obvious sarcasm.
To be honest, Orobas really was somewhat pitiful.
But at the same time, he had been a being willing to shoulder responsibility.
Though he had once abandoned his allies, after truly accepting the people of Enkanomiya as his subjects, he ultimately chose a path of sacrificial martyrdom.
At the same time, he struck a deal with the Heavenly Principles.
Using his own death, he would silence them.
In exchange, countless citizens of Enkanomiya would survive.
Su Han had never personally seen the later parts of the story.
But it had been explained in the game.
Orobas left the outer sea and found a route home.
He believed Enkanomiya could avoid detection by the Heavenly Principles.
Unfortunately, this great serpent encountered a group of simple and honest people.
Even after he confessed that he had once abandoned countless subjects, the people of Enkanomiya still chose to trust him.
In the end, everything was settled.
As they traveled onward, Su Han recounted many things about Teyvat.
Yet the little black coal ball's conclusion was simple.
"Teyvat is very weak."
"Whether compared to the Empire of the Second World or Takamagahara, the gap is enormous..."
"However, there is one good thing about Teyvat."
"The weaker its power, the less it has been corrupted by the Abyss. And the Vision-based power system helps me understand the Heavenly Principles' intentions."
"She wants to use the power of the heart to defeat the Abyss."
"But unfortunately, Khaenri'ah's power and its people are rather laughable."
"Just like those five sinners you mentioned, and that so-called Sinner's Sword."
"Master, do you know why the Abyss is so terrifying?"
"It's not because of temptation."
"It's because desires become amplified."
"Take the Gold Alchemist, for example. She wanted to create life. That is the authority of gods, even the authority of the Heavenly Principles. For mortals to steal divine power naturally requires crossing a forbidden line."
"So what happened in Takamagahara was the same. She stole power."
"As for the others, I can only say..."
"Their eyes have been clouded by the Abyss."
The throne of the Abyss was never something simple.
Those five sinners.
Destroying a world.
Even if Teyvat itself were destroyed, they would likely survive without issue.
The reason the Heavenly Principles' curse was so terrifying was precisely because Khaenri'ah had used power it was never meant to wield.
That led to its final fate.
As for what the Abyss Prince intended to do, Su Han could not be bothered to think about it.
His goal was only one thing.
Strengthen Teyvat.
As long as its defensive power continued to grow, the Abyss would never be able to invade.
Everything else could be left for others to investigate.
Following the coordinates, Su Han flew for three entire days.
During that time, he occasionally sensed faint reactions from within his body.
Unfortunately, both sides could only sense that the other was alive. They could no longer exchange messages through their thoughts.
Eventually, he arrived at the coordinate point.
It was a ruined city.
Or rather, Su Han had found Khaenri'ah's anchor point.
At the very end of the Dark Sea Beyond.
The exact location marked by the coordinates was a tunnel.
And at the end of that tunnel lay Khaenri'ah.
The place had been completely destroyed.
Ruins and traces of devastation were everywhere.
Purple and black energies dominated the landscape.
Su Han had originally thought he would find the Dendro Archon.
But apparently that was not the case.
A trace of confusion surfaced within him.
Yet the coordinates within the crystal continued to draw him deeper inside.
"Further in?"
Passing through the ruins, Su Han headed toward the destination.
Eventually, he found an underground tomb chamber.
The architecture here was unusual.
Mysterious patterns covered every surface.
"Wait... this is..."
Looking at the power surrounding the chamber, Su Han could not hide his surprise.
He recognized the patterns.
The entire structure had been forged from Seastone.
At the same time, it incorporated sealing techniques from Naruto and even the power of Fenghou Qimen.
"So that's why this tomb has survived. It's all because of this formation."
Realization dawned on him.
Placing his hand against the tomb's gate, he analyzed the Fenghou Qimen arrangement.
As long as the formation core was broken, everything would collapse.
His consciousness quickly located the core.
It was the twin phoenix eyes engraved upon the gate.
Whoosh.
Golden light spread outward.
The little black coal ball and everything nearby froze instantly.
Only Su Han remained unaffected.
After confirming that the little black coal ball was merely trapped within a temporal formation, he proceeded inward without concern.
The tomb was built with extraordinary luxury.
It was obvious that it had once belonged to a noble family of Khaenri'ah before being appropriated.
Aside from countless decorations, there was only a crystal coffin.
"Wait, something feels wrong."
Su Han frowned.
If this was truly where the Greater Lord Rukkhadevata had been saved, it should have been somewhere outside Teyvat.
Why was it in Khaenri'ah?
And inside a tomb, no less.
Soon, Su Han arrived before the crystal coffin.
What lay within made his eyes light up.
"So that's how it is."
There was no corpse inside.
Nor was there any remnant soul of the Greater Lord Rukkhadevata.
Instead, there was a sealed Serenitea Pot.
Coincidentally, Su Han possessed one as well.
He picked up the Serenitea Pot without breaking its seal.
Then, together with the little black coal ball, he returned to the Dark Sea Beyond.
Only after completely leaving the world of Teyvat did Su Han enter the Serenitea Pot.
Inside was an island.
There was a setting sun.
There was a moon.
There were even all kinds of flowers and plants.
Hovering in the sky, Su Han could even see farmland below, filled with every kind of vegetable imaginable.
After surveying the area, his gaze finally settled on a woman in a long dress lying on the beach.
She wore pale green clothing.
Though asleep, a faint smile remained on her face.
Su Han recognized her immediately.
She was the Greater Lord Rukkhadevata.