In the 60th year of Konoha, within the core base of Sunagakure's Triangular Sea Region, the metallic sci-fi atmosphere was significantly more intense than it had been a few years prior.
Various metallic triangular pyramids levitated upside down in mid-air, presenting a scenery of a future world.
"Sister Flower, I will have to trouble you to keep watch this time."
Although this was not the first time opening the world barrier, Unohana Retsu was currently a top-tier combat power within Sunagakure who was not inferior to himself, making her presence to hold the line more appropriate.
In the 55th year of Konoha, he and Unohana Retsu had met for the first time. Five years had passed since then. During this period of time, Unohana Retsu had conquered the entirety of Sunagakure from top to bottom with her powerful medical ninjutsu.
Many people even placed her alongside Konoha's Tsunade as the two strongest medical ninjas in the shinobi world.
Because she had consistently appeared under the guise of a medical ninja, many people overlooked that Unohana Retsu was actually even more formidable due to her terrifying swordplay designed for killing.
During these past six years, Shiraishi had engaged in various life-and-death practical combat sessions with Unohana Retsu almost every single day.
His physical instincts had broken through their limits multiple times, allowing him to consistently maintain a peak state of combat awareness.
Similar to the preparations for the previous few barrier crossings, a massive amount of Ryuka energy needed to be mobilized to break through the spatial barrier.
However, with the technology becoming increasingly mature over recent years, the consumption and utilization efficiency of the Ryuka had improved substantially.
The super regeneration core modeled in the shape of six mirrors was the latest generation of supercomputing system developed by Shiraishi.
In addition to stabilizing the crossing connection between the two worlds on the original foundation, it possessed a faster processing algorithm to perform system self-updates and enhance performance after collecting intelligence and information from the opposite world.
In the future, Shiraishi could deploy more of these regeneration cores across various worlds to perform all kinds of data and information collection, which would then be converted and stored.
Compared to the half-finished Deep Sea Mithril Glove and the first-generation super regeneration core projected into the first two worlds, its functions were far more complete.
Unohana Retsu carefully measured the supercomputing device resembling six mirrors before her eyes and could not help but marvel: "I see, this thing truly is exceptionally ingenious."
While the regeneration core system within Shiraishi's pupils connected with the entire ocean base system, the surrounding sky suddenly ripped open.
The Seven Treasures Tree, prepared for a long time, was projected from Shiraishi's hand, turning into an expanse of colored clouds in mid-air.
Under the illumination of the powerful light, an unknown world existed opposite the massive rift that had been torn open.
Using the exact same method as last time, two-dimensional holes suddenly shot out. One of the dimensional holes merged into the massive dark fissure and then appeared in the world on the opposite shore.
The moment the regeneration core system was deployed into the opposite world, it seemed to trigger a bout of violent spatial vibration.
The principle of equivalent exchange activated once again!
"Over these past few years, I have been quite curious as to why you insist on continuously opening the world barrier. Even if it is to investigate the truth of the world..."
Shiraishi, under the illumination of the regeneration core light within his eyes, remained silent for a long time before revealing the truth: "In factual reality, the rules of this world are actually not complete, and are even riddled with loopholes."
Riddled with loopholes?
"The order of the Three Realms in this world is complete; when has it ever been riddled with loopholes?"
"Sister Flower, the order of the Three Realms you see is a complete grand concept, rather than this individual world alone."
As Shiraishi said this, the hand sign formation on his hands continuously activated, and the crack in the sky expanded inch by inch.
Unohana Retsu was no fool and understood Shiraishi's words instantly: "I see, the composition of this world is a multi-parallel world? The existence of the complete order of the Three Realms that I observed does not belong to this world, or rather, this time and space?"
"Perhaps it is so... The essential nature of this world's existence has consistently been what I explore and investigate."
The future world where Yamato came from connected with this current world in a certain form, but the deeper Shiraishi investigated, the more he discovered that the orthodox Naruto world of Yamato's future was different from this world.
This subtle difference caused Shiraishi to harbor a bold suspicion...
Perhaps, the core essence of this world was merely a world similar to the Limited Tsukuyomi world generated in the original work.
It was precisely because the laws of this world were incomplete that it led to the appearance of the foreign glasses system, as well as his current continuous breaking of the world barrier to summon deceased individuals from other dimensional worlds.
His past encounter with that Asura in the Forest of Asura might have inherently been a special illusion.
Being inside the game, he was unable to see through the barrier of illusion. Therefore, Shiraishi would continuously break the barrier between the two worlds to search for the true meaning and essence of this world.
During the process of thoroughly opening the barrier between the two worlds, a faint crack progressively appeared upon the body of the Seven Treasures Tree ninja tool. Clearly, traversing the world barrier three times had caused it to suffer very severe damage.
Under the illumination of the Seven Treasures Tree's light, a special Shikon mark strikingly appeared on the third mirror within Shiraishi's consciousness world.
Legend had it that several hundred years ago, a highly powerful priestess named Midoriko possessed the technique to extract and purify souls, as well as the ability to exorcise demons.
A vast number of demons—including spirits, dragons, earth spiders, and other monsters—gathered and merged together to form a single great demon in order to deal with her.
During the prolonged battle against this great demon, Midoriko ultimately could still not secure victory due to physical exhaustion. Consequently, she utilized her final strength to seize the souls of the monsters, melted them into her own soul, and released them outside her body.
Thus, Midoriko and the monsters all died, leaving behind only the crystallization of souls, which was the Shikon no Tama.
For hundreds of years, the Shikon no Tama was passed back and forth between the hands of monsters and humans. Legend had it that this jewel could grant monsters powerful abilities and also allow powerful spiritualists to destroy demons.
Ultimately, it was passed into the hands of the leader of a demon slayer village. To prevent the Shikon no Tama from falling into the hands of monsters, the jewel was handed over to a priestess with immensely high spiritual power to guard.
In the past, many monsters wished to snatch this jewel, all of whom were destroyed by this powerful priestess.
However, this priestess fell into a misunderstanding with her lover due to the scheme of an evil demon, ultimately dying as she was cremated together with the Shikon no Tama while filled with deep resentment.
Shortly after the principle of equivalent exchange ran its course, a special Shikon no Tama appeared before Shiraishi. However, Unohana Retsu's gaze was very sharp, and she saw the unusual nature of this jewel with a single glance.
I see, it truly is a unique item... somewhat similar to the Hogyoku, but without such strong corrosive properties, requiring a person with a sufficiently pure soul to wield it.
The exact moment Unohana Retsu received this Shikon no Tama, just as Shiraishi wished to conclude the channel barrier between the two worlds, a massive black curtain suddenly tore open from the ocean world, as if the Gates of the Underworld had opened.
Yomotsu Hirasaka!
The space-time ninjutsu exclusive to the Otsutsuki clan appeared. Shiraishi's pupils shrank, and high up in the sky, a silver-haired young man wearing Ninshu attire and holding a folding fan appeared with a cold sneer.
Beneath his short silver hair, a pair of eerie Rinnegan circled within his eyes. This member of the Otsutsuki clan looked down at Shiraishi and Unohana Retsu below with a scrutinizing gaze.
"I see, the source of this world's distortion is right here."
Meeting the gaze of the mysterious powerhouse from the Otsutsuki clan, the Sage Style power across Shiraishi's entire body elevated to the absolute limit, while the internal danger level within his heart was similarly pulled to the highest: "The Otsutsuki clan..."
"Allow me to introduce myself, I am named Otsutsuki Ryushi!"
The instant the Rinnegan activated, Otsutsuki Ryushi appeared behind Shiraishi with a Body Flicker. A special Eight Trigrams Gale Palm condensed upon his palm and blasted out, only to find the latter simultaneously releasing a whirlwind blade to block his assault!
The explosive airflow generated by the clash between both sides caused the entire ocean base to become unstable and rock back and forth...
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