[Uchiha Clan Grounds]
[Orochimaru's Laboratory]
Nagato had already completely recovered his health.
Although he was already twenty-nine years old, as an outstanding individual of the Uzumaki clan, he looked entirely like a teenager.
Especially with his hair covering half of his eyes, his chuuni aura was maxed out.
Nagato, Konan, Rengoku, Orochimaru, all of them were gathered here.
Today, they were going to revive Yahiko.
With Orochimaru's calculations, and with the massive life force provided by the Water of Life, Nagato couldn't possibly die.
The only uncertainty was, how much pupil power would Nagato need to activate the Rinne Rebirth Technique.
This was the most important part of today's experiment: to test how much pupil power was required to revive one person.
Or rather, if reviving different people required different amounts of pupil power.
Because it was the first time, and there was risk, the one being revived was Yahiko.
Even if anything went wrong, at least Yahiko would come back to life.
They had already removed all the black rods from Pain's body.
And placed him into a nutrient tank.
In Orochimaru's words, this was "body reactivation."
Reducing, to a certain degree, the life force required for the Rinne Rebirth Technique.
"…Attach all these monitors to your body, they can measure the rate at which your life force diminishes."
"You just perform the technique normally."
Such a major matter, Nagato and Konan had already confirmed it multiple times.
From the nutrient tank beside him, Orochimaru scooped out Yahiko's naked corpse.
And placed it on the sickbed.
Next to him, Yakushi Kabuto skillfully attached all kinds of monitoring equipment to Nagato, along with an IV drip of Water of Life.
Kabuto made a hand sign, indicating everything was ready.
"Alright! Let's begin now!"
Nagato and Konan exchanged a glance, then slowly took a deep breath.
His hands clasped together, and massive pupil power began to surge.
Orochimaru watched the numbers on the monitors jump crazily, his eyes full of amazement, 'Such powerful pupil power.'
Rengoku folded his arms, also sensing the difference between the Rinnegan's pupil power and his own eyes.
From his perception, the Rinnegan not only had a greater total amount of pupil power, but also far higher intensity.
"Outer Path, Rinne Rebirth Technique!"
A huge energy surged into the void, as if a portal had opened in midair.
A cluster of light, invisible to ordinary people, flew out of it.
Orochimaru frowned slightly, as if he had noticed something, while Rengoku stomped his foot down.
A massive formation instantly spread out within the entire underground space.
A faint phantom appeared in the air.
That phantom quickly sank into Yahiko's body.
"Haa!"
Nagato's eyes continued to release immense pupil power, the force directly acting on Yahiko's body.
Yahiko's body began to emit steam.
Nagato's life force, however, plummeted rapidly.
Rengoku's hand was placed right behind Nagato, ready to act if necessary.
But compared to expectations, Nagato's fully recovered life force was so vast that only about one-third of it was consumed, and Yahiko's body had already regained color, his skin quickly restoring elasticity.
Along with the machines sounding, beep… beep… beep… Yahiko's heart also began to beat in sync.
With his chest rising and falling, Yahiko hazily opened his eyes.
He blinked at the dazzling overhead light, his expression still dazed.
It was as if Yahiko had been dreaming for a very long time, a dream in which he had already died.
But Nagato and Konan were using his corpse to continue fulfilling his dream.
Every time Konan tended to his body, her eyes had been slightly red.
The memories were fragmented, scattered, broken.
Leaving Yahiko unable to distinguish for a moment whether this was reality or still a dream.
After confirming Nagato was alright, Konan came to Yahiko's side.
"Yahiko…"
"Yahiko!"
The voice so close pulled Yahiko's thoughts back at once.
Konan's face was already right in front of his eyes.
Yahiko hesitated a little and said,"Konan, I… wasn't I dead?"
Once she confirmed Yahiko had truly been revived, Konan threw herself into his arms.
"Yahiko! Wuwuwu…"
Konan hugged Yahiko and wailed, for a moment not knowing what was happening, but instinctively, Yahiko held Konan and comforted her.
Nagato, whose face had been deathly pale, recovered quickly with the replenishment of the Water of Life.
Orochimaru, seeing Nagato's vitals return to normal, waved his hand at Yakushi Kabuto.
Kabuto promptly removed the IV of Water of Life and detached all the monitoring devices.
On the other side, in Konan's sobbing voice, Yahiko finally understood. He had been dead for fourteen years.
Nagato also came over to Yahiko's side.
"Yahiko!"
"Nagato!"
"Thank goodness, thank goodness…", Yahiko, seeing Nagato healthy, soon had reddened eyes as well.
With the information Konan provided and the fragmented memories of his dream combined, Yahiko could already feel how hard Nagato and Konan had suffered.
At this moment, Rengoku tossed a surgical gown over Yahiko.
Rengoku laughed, "Can you guys at least let Yahiko put on some clothes before chatting?"
Yahiko suddenly realized, he was still naked.
"Ah… okay…", Konan's face instantly flushed red.
Although back when Yahiko's body was modified Konan had already seen everything, that had been a corpse. Now it was a living person, completely different.
Rengoku ignored the three of them and walked over to Orochimaru.
"How's the data monitoring looking?"
Orochimaru shook his head slightly, "Nagato's release of the Rinne Rebirth Technique had two stages."
"One stage was opening the Pure Land to connect with the living world, and the second stage was the actual resurrection."
"If we first summon the soul over, we can save the pupil power lost in the first stage."
"These two stages together consumed about one-third of Nagato's pupil power."
"As for how long that one-third will take to recover, that depends on Nagato's condition afterwards."
"The loss of life force is related to the condition of the person being revived."
"With both soul and body present, there's a fixed loss of life force. Other than that, Yahiko's old injuries consumed part of it as well."
Rengoku's eyes were thoughtful, "So if those cells still had vitality, and you created a clone body, the consumption would be smaller?"
Orochimaru nodded in agreement, "That's the theory, but for those whose cells have long lost vitality, cloning is impossible."
"But it could serve as a medium for Edo Tensei."
"Next time, by using Edo Tensei first and then reviving, we can test how much pupil power and life force are needed for different people."
"But the next person to be revived is for you to choose."
Rengoku's lips curved slightly, "That's a small matter. Once Nagato's pupil power recovers, we'll do it immediately."
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