By the time the punishment room doors opened, Yue Liusi had already left with Mai Zenin.
The Tombs of the Star Corridor.
Yue Liusi brought Mai Zenin here.
Mai Zenin had not quite died yet. Her injuries were secondary; fundamentally, she had ended up in this state because she had overdrawn her vitality, and Nine-Tails chakra happened to have a unique advantage in this regard.
After all, Yin Nine-Tails was still the Nine Tails. When the Nine Tails split in half, the difference in their chakra was only in the proportions of its components, not its entire composition.
The Yin Nine-Tails having more chakra weighted toward spiritual energy did not mean he had none weighted toward life energy.
He had less than the Yang Nine Tails, but only less than the Yang Nine Tails.
Taken on its own, it still far exceeded Sukuna's total cursed energy.
That was why she was still clinging to her last breath.
Of course, if she was left unattended, even Nine-Tails chakra would probably soon become useless.
In fact, healing Mai Zenin was extremely simple for Yue Liusi.
Projecting reverse cursed technique outward was indeed difficult, but that was for other people. Within two days of mastering reverse cursed technique, he had already been able to project a little positive energy.
With medical ninjutsu and Nine-Tails chakra added to that, healing someone was incredibly easy.
However, it was precisely because Mai Zenin was currently in a state of suspended death that Maki Zenin could fully obtain the power of heavenly restriction.
Once she was healed, the twins' curse would immediately take effect.
That was why he needed to draw on Tengen's skill with barrier techniques.
This was also a method he had only thought of after discussing it with Tengen.
He would completely isolate Mai Zenin's soul with a barrier technique, severing the connection and rendering the concept of twins invalid.
As for how to accomplish that...
"This idea of yours is far too fanciful."
After appearing and hearing Yue Liusi's idea, Tengen expressed her doubts.
Who would try to "deceive" the twins' curse this way? No matter what, suspended death was still life.
"It can't be done."
That was what Tengen said.
But Yue Liusi clearly paid her words little mind.
"Nothing in this world is absolute. How will we know without trying?"
At that, Tengen could only nod.
"I'll do my best."
"No, I'll do it."
Yue Liusi's words were quite unexpected, leaving Tengen somewhat surprised.
"You only need to help me with the details."
Hearing this, even Tengen, normally as unflappable as an old hound, frowned.
"I know you're very talented, but you've had too little time. There can be no room for carelessness in something like this."
In response to Tengen's concerns, Yue Liusi merely chuckled.
"I'm just giving it a try. If I can't do it, you can take over."
Hearing that, Tengen could only nod helplessly.
Soon, under Tengen's theoretical guidance, Yue Liusi began experimenting using the special properties of Nine-Tails chakra.
Failure.
Failure.
Failure...
Something that seemed difficult even in Tengen's theoretical assessment actually began showing a little progress under Yue Liusi's repeated attempts.
But even that little progress was enough to shock Tengen.
Well, geniuses could not be judged by ordinary standards.
She accepted that reality.
"If you keep at it, success may not be impossible. Don't rush. There's nothing to lose, after all."
If it really did not work, they could simply wait until the business with the Zenin Clan was over, then restore the twins' curse.
It was not anything urgent anyway.
They could continue their research afterward.
Choso was also inside the Tombs of the Star Corridor, but to him, the conversation between Tengen and Yue Liusi might as well have been gibberish. Naturally, staying in the distance and spacing out was better.
Yue Liusi naturally understood what Tengen meant.
But since he had made progress, he did not want to stop here.
"Are you trying to use this to study other people's souls?"
Tengen had also belatedly begun to realize Yue Liusi's goal.
After all, simply keeping the twins alive did not require this much trouble, and given his strength, there was little need to fully unleash a heavenly restriction.
Unless these two were very important to Yue Liusi, and he had to strive for the best possible outcome.
But that was clearly not the case.
Studying souls, on the other hand, was a very plausible goal.
Dying Jujutsu Sorcerer twins were one-of-a-kind research subjects.
Others might find it difficult, and even she would struggle to accomplish it. Only an existence uniquely endowed like Mahito could do it, but Yue Liusi himself was extremely unusual.
Even now, Tengen could not explain those special powers Yue Liusi possessed at all.
If he were not unmistakably human, she would have suspected that Yue Liusi had come from another planet.
"Correct, but there's no prize."
Yue Liusi felt that he had quite the spirit of scientific inquiry, but ultimately, all of this was merely insurance for his future life of taking it easy.
"Targeting souls and such... that isn't exactly good conduct."
Tengen shook her head. There was little more she could say, since Yue Liusi had saved the girl's life.
Calling it toying with souls would not really be accurate either.
It was just that, in her memories, those who walked this path generally did not turn out to be good people.
"I know where to draw the line."
After answering, Yue Liusi sank into thought.
Just then, the little fox suddenly appeared on his shoulder and nuzzled him with his head, immediately making Yue Liusi think of something.
That's right!
The spiritual energy in Nine-Tails chakra could sense minds when enhanced by the Sharingan's ocular power. What if I made ocular power the foundation and enhanced it with Nine-Tails chakra instead?
At that thought, he immediately began actively controlling the fusion of chakra and ocular power.
For him, possessing chakra control mastery and the Sharingan, this was not difficult.
As this power entered Mai Zenin's body, the barrier technique, which had previously been difficult to sustain and unable to affect the soul, gradually began to stabilize.
Ocular power was inherently capable of affecting souls. With the enhancement of Nine-Tails chakra, it became even more stable and could thus sustain the barrier technique.
Of course, this alone was not enough. The energy formed by combining ocular power and chakra spread throughout the entire barrier, not only isolating what was inside but also affecting it.
This was equivalent to a built-in illusion that targeted only the soul.
Under these circumstances, the soul would believe it was already dead.
Meanwhile, consciousness remained unaffected.
The soul was isolated by the barrier and deceived by it, ultimately breaking the twins' curse.
The only drawback was that Yue Liusi needed to supply chakra at regular intervals to keep the barrier running, and Mai Zenin could no longer possess cursed energy.
But that did not matter.
"From now on, this will be called... demon eyes power."
Yue Liusi gave his newly formed power a name.
"Yue..."
Mai Zenin had woken up long ago, but seeing Yue Liusi and Tengen working on something, she had not resisted and had simply waited quietly.
Only when she saw him stop did she speak.
After dying once, her mental outlook had changed enormously.
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