Because their bloodlines were impure, Mangekyō Sharingan from the Warring States period already carried the risk of blindness.
Moreover, they had already degenerated to the point that even the three-tomoe Sharingan could be considered a Mangekyō Sharingan. But during the Warring States period, it was only considered a Sharingan.
"By nourishing the Mangekyō Sharingan and Byakugan with chakra, once the concentration of ocular power within them reaches a certain level, the Mangekyō Sharingan will evolve.
If the Byakugan and Mangekyō Sharingan fuse, there's a one-in-a-million chance they'll evolve into the Rinnegan.
"If the Otsutsuki genes don't have Sharingan genes, then the nourishing layer of brain cells will lose the ability to awaken the Sharingan. The genes will then become Senju or Uchiha genes, and that's where the Sage Body and Sage Eye come from."
"Absorbing the ocular power from these Byakugan and Mangekyō Sharingan can greatly shorten the time it takes for my Mangekyō Sharingan to evolve into the Rinnegan. At this rate, my Byakugan and Mangekyō Sharingan will evolve into the Tenseigan and Rinnegan in less than three years."
Otsutsuki Yuhao thought to himself.
After more than twenty years of research, Otsutsuki Tatsuten considered his knowledge of the human body second only to Orochimaru's. And thanks to the Byakugan's exceptional vision, he was even better than Orochimaru in certain areas.
In this world, which was close to a primitive civilization, he didn't even need a magnifying glass.
Fortunately, he had the Byakugan. Otherwise, researching his own cells would have been much more difficult.
In an open area,
two figures clashed at high speed.
A flash of sharp light cut through the air once again. Their short swords collided midair, sending sparks flying.
Zi Tianming quickly adjusted the angle of his short sword, grabbed Qinshou's arm with his left hand, and thrust at her with his right.
But—
Qinshou reacted quickly. She instantly drew the sword at her waist and blocked the strike.
Their swords clashed with a sharp clang.
The sound of weapons colliding rang out repeatedly around them.
Then Zi Tianming threw a punch, trying to knock Qinshou back.
But Qinshou dodged nimbly in midair and kicked Zi Tianming in the face.
Zi Tianming hit the ground, but quickly got back up and stood firm.
[Fire Release: Great Fireball Technique B]
Zi Tianming rapidly formed Hand Seals and spat out a fireball four or five meters across, sending it toward Qinshou.
[Water Release: Water Formation Pillar B]
Qinshou gathered chakra in her throat, then spat out a meteor-shaped ball of water that instantly extinguished Zi Tianming's Great Fireball.
"Using that move again?"
"Let's see how you put out my fire this time!"
Zi Tianming shouted as he rapidly formed Hand Seals.
[Fire Release: Heavenly Dragon Fire Technique A-rank]
Zi Tianming spat out a twenty-meter-long fire dragon that charged toward Qinshou.
"An A-rank ninjutsu? Looks like you're getting serious!"
[Water Release: Water Dragon Bullet]
Qinshou spat out a stream of water that formed a dragon, slightly larger than Zi Tianming's fire dragon.
Rumble!
The moment the water dragon and fire dragon collided, a huge explosion rang out.
The forces of their chakra destroyed everything within a hundred meters.
Mist and the smell of scorching filled the air. The two elemental techniques vanished after colliding, leaving only devastation behind.
Zi Tianming panted, determination flashing in his eyes. He hadn't expected Qinshou to be so powerful that she could easily withstand even his A-rank ninjutsu. But rather than discouraging him, it only fueled his fighting spirit.
"Looks like I'll have to show you what I can really do!" Zi Tianming muttered, forming Hand Seals rapidly once more.
[Fire Release: Phoenix Flower Jutsu S-rank]
This time, Zi Tianming didn't simply spit out flames. He thrust both hands forward, and dozens of fireballs shot out between them. They flew through the air like a flock of fire phoenixes, then sped toward Qinshou.
Qinshou was startled by the sudden attack. She hadn't expected Zi Tianming to have such a powerful technique. But she didn't panic and quickly formed Hand Seals.
[Water Release: Great Waterfall Technique S-rank]
Qinshou swept both hands forward. A massive column of water surged from them, instantly becoming a waterfall that rushed toward the fire phoenixes.
Water and fire met in the air once again with a thunderous roar, creating a powerful gust. Everything around them swayed in its wake, as if it might be swept away at any moment.
Zi Tianming and Qinshou stared intently at each other, determination shining in both their eyes. They knew this fight had only just begun, and the outcome was still uncertain.
"Shinra Tensei!"
Just then, Otsutsuki Tatsuten's voice rang out.
An invisible force instantly dispelled all the chakra.
"Are you two trying to destroy this entire forest?"
Otsutsuki Yuhao scolded Zi Tianming and Qinshou.
Although Otsutsuki Tatsuten hadn't awakened the Rinnegan yet, he could still use some of its basic abilities.
That was because Otsutsuki Yuhao's Byakugan had this ability.
"If you want to fight, go do it by the sea!"
Otsutsuki Tatsuten said to them.
"The sea? Then I'd have even less chance of beating Senior Sister.
"She specializes in Water Release Ninjutsu. How could I, a Fire Release Ninja, possibly beat her?"
Zi Tianming said with a wry smile.
"Teacher, you can't blame me for this!"
"I told him not to use ninjutsu, but Zi Tianming went and used it anyway."
Qinshou blinked her big eyes, wrinkled her small nose slightly, and smiled sweetly.
She linked her arm through Otsutsuki Yuhao's and spoke to him in a soft, coquettish voice. Otsutsuki Yuhao couldn't help softening toward her.
"This life is pretty nice, though."
"But..."
Otsutsuki Yuhao thought to himself. But whenever he thought of those extraterrestrial Otsutsuki, he couldn't help feeling uneasy.
The Otsutsuki wouldn't arrive in the Ninja World until a thousand years later, but Otsutsuki Yuhao didn't know whether his presence in this world might cause them to come early.
Also, he'd clearly been transported to the world of Naruto, yet he still hadn't met any of the main characters, like Naruto and Sasuke. Would he simply grow old and die in the world of Naruto?
Otsutsuki Yuhao found that thought unbearable.
If that really happened, it would be ridiculous.
"Senior Sister and Teacher clearly have more than an ordinary teacher-student relationship.
"They're practically about to kiss!"
Zi Tianming watched Otsutsuki Yuhao and Qinshou with helpless resignation.
Though Qinshou and Otsutsuki Yuhao were teacher and student, everyone in the Sage Sect could see that the two were more like lovers.
But Qinshou had been the first to follow Otsutsuki Yuhao, so no one said anything. And in this era, it wasn't all that strange for a teacher and student to end up together.
"Come on. You're about to become a Grandmaster. Stop acting like a child."
Otsutsuki Yuhao gently pushed Qinshou away.
"So what if I'm a Grandmaster? Even a Grandmaster would be a child in front of you, Teacher!"
Qinshou smiled sweetly and tenderly as she gazed at Otsutsuki Yuhao with affection.
That look always made Otsutsuki Yuhao feel a little strange.
He could guess that Qinshou liked him, but he'd never paid it much attention. He'd focused most of his energy on studying the human body.
As for Qinshou's feelings for him, Otsutsuki Yuhao only thought of her as a younger sister and a student.
Three years later,
Asura and Indra returned to the Ninja Sect.
During those three years, Asura and Indra had put an end to the conflicts between villages around the world.
They had spread techniques for farming and animal husbandry across the world.
Because both brothers came from the Ninja Sect, this time,
the Ninja Sect's name finally spread throughout the world.
It was renowned everywhere, and perhaps its legacy would live on for hundreds or even thousands of years.
In the Ninja World,
the Ninja Sect represented the shinobi, while the Sage Sect represented the common people.
The Ninja Sect was the strongest, and the Sage Sect was the best.
That was what all the common people thought.
Still, the Ninja Sect's standing among people around the world was no lower than the Sage Sect's.
Perhaps Otsutsuki Yuhao hadn't expected that the Sage Sect he had created on a whim would earn such a reputation throughout the world.
Before you continue