The space trapping Otsutsuki Isshiki was constructed by a dōjutsu named Sukunahikona, stored within Isshiki's right eye. No one other than himself could freely enter or exit this space.
Much like Kaguya Otsutsuki's Amenominaka, even with his six-magatkyo Sharingan, Sasuke Uchiha couldn't break through the space from within and return to the ninja world.
If it hadn't been for the Sage of Six Paths summoning the souls of the previous Kage from the outside to activate a summoning jutsu together, the Seventh Hokage team, having just saved the ninja world, would have been trapped and died within Kaguya Otsutsuki's dimension.
Did Otsutsuki Isshiki believe what Orochimaru said?
He didn't.
But he didn't dare to gamble!
He sensed that Orochimaru's true strength might not be something his current body, with its incomplete karma, could contend with.
If Orochimaru were to truly return to the ninja world, regardless of whether he could defeat him, if Orochimaru stole the Chakra Fruit borne by the God Tree, it would be truly laughable.
With this thought, Otsutsuki Isshiki saw Orochimaru's gaze fixed on his hiding spot. He decided to stop concealing himself and boldly restored his body to its original size.
"Orochimaru..."
"Do you not fear angering me and sealing you here forever by saying such things?"
Even in his anger, Otsutsuki Isshiki didn't boast about killing Orochimaru.
As beings of the same Six Paths level or higher, Otsutsuki Isshiki knew that without understanding each other's intelligence, neither could do anything to the other.
At worst, one would be defeated, sealed, or reincarnated through karma like the Otsutsuki clan; in any case, there wouldn't be a worse fate.
This was what Otsutsuki Isshiki thought.
However, Orochimaru was different.
From the very beginning, Orochimaru had come with the intention of completely killing Isshiki.
"Heh heh..."
Orochimaru chuckled softly and slowly shook his head.
"So, that's how you understood what I just said?"
"You are an enemy from beyond the heavens who wishes to destroy the ninja world, and I..."
"...am the master who wishes to protect his territory!"
As Orochimaru declared his stance, he slowly spread the powerful Six Paths energy within his body to every corner of the space.
Simultaneously, strands of dark, ink-like energy seeped into the earth from beneath Orochimaru's feet. Along with the Six Paths energy in the air, they sealed the entire space that originally belonged to Otsutsuki Isshiki.
"We are, by nature, enemies destined to fight until death."
"Rather than saying I want to anger you..."
"I want to kill all enemies who intend to contaminate the ninja world!"
"This world is mine!"
Orochimaru's voice rose with his aura, reaching a limit and transforming into rumbling thunder.
"Roar!"
As if echoing his oath, a high-pitched dragon's roar suddenly erupted from within Orochimaru.
Under Otsutsuki Isshiki's astonished gaze, Orochimaru suddenly transformed from a human into a slender, snake-like monster.
"What is this thing?"
While Otsutsuki Isshiki was still in shock, the white dragon that Orochimaru had become had already launched an attack.
"Sage Art - Inorganic Reincarnation!"
The white dragon let out a soft cry, and the earth of the entire dimension trembled under its immense sage power.
Countless stone dragons clad in dark chakra emerged from the ground, roaring and snarling as they lunged at Otsutsuki Isshiki.
A seemingly ordinary attack.
Otsutsuki Isshiki could see that these stone dragons were merely the product of Orochimaru activating the rocks on the ground with the unique senjutsu chakra of the ninja world.
Having hidden in the ninja world for a thousand years, Otsutsuki Isshiki naturally knew the counter-relationship between senjutsu chakra and Onmyōton.
While he couldn't absorb this natural energy like ordinary chakra, Otsutsuki Isshiki wasn't without a solution.
Otsutsuki Isshiki sneered. His right eye flashed, and countless Onmyōton black rods appeared from the void.
The black rods moved at his will, shattering the approaching stone dragons one by one.
However, Otsutsuki Isshiki failed to notice that as the stone dragons shattered, the dark chakra that had enveloped them had already transferred to him through the contact between the Onmyōton black rods and the stone dragons.
"Orochimaru, is this all the strength you possess as the so-called master of the ninja world?"
After easily blocking Orochimaru's first wave of attacks, Otsutsuki Isshiki mocked Orochimaru's powerlessness. He then pointed at the white dragon floating in the air, and countless black rods suddenly materialized around Orochimaru, swarming towards the dragon's smooth body.
"Clang, clang, clang..."
A chaotic series of crisp sounds ensued. The black rods, which could pierce through Madara Uchiha's complete Susanoo with a single blow, couldn't even scratch the scales on the white dragon's body. They were repelled by the dense, solidified sage energy surrounding it, turning into a cloud of gray smoke.
"Heh!"
Orochimaru said nothing, merely letting out a cold snort as a response to Otsutsuki Isshiki's previous actions.
His single syllable, however, contained an intense disdain that stabbed into Otsutsuki Isshiki's heart like a steel knife.
"You..."
Otsutsuki Isshiki abandoned his usual elegant demeanor, reaching up and touching the karma on his jaw, releasing all the power from the part that had fully unfrozen.
Dark lines instantly spread across Otsutsuki Isshiki's body, and Jigen's face gradually transformed into Otsutsuki Isshiki's true form as the power within the karma was activated.
The pale skin and grayish-white hair characteristic of the Otsutsuki clan.
A bone-like long horn protruded from the left side of his forehead, curving along the back of his head and extending upwards to his right forehead, forming a somewhat curved, long, pointed horn.
The overall shape of the horn was very unique, resembling a crown.
Below his forehead, his eyes were one white and one gold.
The left eye was the renowned Byakugan of the ninja world, while the golden right eye's pupil displayed a golden ring pattern, surrounded by eight triangles.
Above the right eye, a single eyebrow with a hollow center rested alone.
Coupled with Otsutsuki Isshiki's majestic face, it possessed an eerie beauty.
...
Powerful energy flowed within him. Otsutsuki Isshiki clenched his fist, and the long-lost feeling of satisfaction filled him with confidence.
"Orochimaru, the real battle has just begun!"
As Otsutsuki Isshiki's cold voice fell, his figure instantly disappeared.
"Boom!"
A loud roar echoed from mid-air in the dimension as Otsutsuki Isshiki vanished. Countless black cubes materialized above Orochimaru's head.
"Daisekiken - Forbidden!"
With a faint, ethereal cry, these black cubes instantly expanded dozens of times and then crashed down upon the white dragon below.