The plan has been decided, compared to Naruto Uzumaki, who is a little ignorant of spiritual power, Sasuke Uchiha, who is good at illusion, is more familiar with the battle in the spiritual space.

After all the preparations were made, Kakashi Hachiki remained on the sidelines to prevent accidents from happening, while Sasuke Uchiha sat cautiously in the small waterhole of the True Waterfall, and then chakra and perception diverged outward.

After a while, Sasuke Uchiha, who had his eyes closed, was wondering why he hadn't reacted yet, and suddenly, he felt something, and then opened his eyes and looked at the real waterfall in front of him, which was no different from just now.

"It's already started!"

Silently, it makes people unconsciously fall into the spiritual world, and the real waterfall is indeed not in vain.

Although it is exactly the same as the scenery of the outside world, the surrounding environment is no longer real, but people are unaware of it, and it is replaced by a spiritual space.

As time passes, the ninja captured by the True Waterfall will sink deeper and deeper, and eventually, the root evil obsession in the heart will be completely mobilized.

"It's been so long, it should be about the same......"

Although Sasuke Uchiha, who has the eternal kaleidoscope writing wheel eye, has the ability to resist it, if he does it with all his might, he may be able to completely break through the spiritual space created by the true waterfall even if he does not fall into the depths.

But Sasuke Uchiha, who has a heart for indulgence, still waits for some changes to slowly happen around him.

The originally sunny sky became dark and obscure, and the faint gray mist, like shrouding the scenery in a thin veil, made people feel a little unreal.

While Uchiha Sasuke was waiting, the flowing water of the waterfall suddenly twisted, and Sasuke, who had dark skin and lightning flashing behind his back, and two long swords, one red and one white, slowly walked out.

"I'm sorry to keep you waiting, it's not easy to show up once!"

The strongest fighting stance before the kaleidoscope writing wheel eyes opened, the dark side of Sasuke Uchiha appeared in the mental space in this way.

Sasuke Uchiha frowned, looking at the familiar face.

"How ugly I used to be?"

Originally, his hair turned an embarrassing lead gray, the color of his skin became darker, and the distortion on his face due to the burst of power did not look like a kind teenager.

Even the thunder sword wings that show a sense of power give people a terrifying sense of threat.

The dark side of Sasuke, who is holding a sword in both hands, is too different from the main body, and the feeling of strangeness cannot be lingered.

"So, you're overestimating yourself...... No, it's me!"

Originally, the two of them were one, and the power of the True Waterfall itself was not strong, but it was able to lure the ninja who fell into it, split its heart into two opposing parts, and then contain each other's influences.

The dark side incarnation opposite Uchiha Sasuke, its strength does not depend on how much power the true waterfall has, but whether his own reason suppresses the desires that cannot be hidden in his heart.

"I really don't know what to say!"

The kaleidoscope chakra eye in Uchiha Sasuke's left eye instantly appeared, and where his gaze was focused, a pitch-black flame suddenly rose from the place where Sasuke's dark side fell, enveloping it in the blink of an eye, and a moment later, it was burned to ashes.

"Dare to speak out with such a little strength?"

"Yes!"

A strange voice suddenly appeared behind the side, and the startled Uchiha Sasuke hurriedly flew to dodge, but a large hole was still cut in his right arm.

"How can it be unscathed?"

Although it is a spiritual space, the simulated Amaterasu Black Flame is still lethal, and the spiritual war is very terrifying, if the damage to the spirit is strong enough to a certain extent, it can be fed back to the body directly through the chakra, and if it is completely wiped out here, it is very likely that it will really die.

"It seems that you haven't figured out the nature of the True Waterfall yet!"

Taking advantage of the speed advantage of the thunder light sword wing, suppressing the dark side incarnation played by Sasuke Uchiha while attacking,

"Your enemy is not the True Waterfall, but yourself, and if you can't find the true cause of my birth and eradicate it, I can't be destroyed here, unless you die too!"

"So troublesome?"

Uchiha Sasuke thought as he fought, and after a moment, he raised his head and looked at the dark side incarnation with a long afterimage,

"It seems that ninjutsu duels and battles are just a means to stall for time and get me into a deeper trap, so that I can't be distracted. I would venture to ask, what would happen if I failed?"

"Hahaha...... of course "we" are still safe, but as a result, you don't know if it will dominate the will of the body in the future. ”

"How is it possible? This is obviously just a trial, there shouldn't be such danger!"

"Dangerous, no, I think you're mistaken......"

Sasuke's dark side incarnated with a wicked smile at the corner of his mouth,

"You are Uchiha Sasuke, but Uchiha Sasuke is not you, even if you disappear, it will not affect Uchiha Sasuke's survival as an individual......"

"Are you saying that you will replace me in the future?"

"I don't like the word "replaced?"

Sasuke's dark side incarnation slowed the pace of the attack slightly,

"Actually, we are one, just two incompatible points of disagreement, usually I don't show influence over the will, but now, I can exist independently, although it is not complete, but it will be soon. ”

For the first time, Sasuke Uchiha was a little annoyed by his motives for rushing into the True Waterfall, and he was really a little reckless.

"If I can't hold on, will I be invaded by a twisted will? and how deep the impact will depend on my consciousness!"

At the same time, Sasuke Uchiha has some doubts about the true role of the True Waterfall.

"If it weren't for a ninja who is extremely proficient in spiritual power, I'm afraid he wouldn't understand so much, and people who are not sensitive to yin retreat won't be able to appreciate the true effect of this at all. What should this ability be called?"

"Who knows...... However, there are some monks who pretend to be gods and ghosts seem to know these things, baptism, inspiration or something, probably like this, if it is an evil god, it is called charm, depravity and the like, but the secular world is easier to understand, I think the term brainwashing is still the most appropriate. ”

"The true will of the heart brainwashes itself?

Knowing the current situation, Uchiha Sasuke is relieved, the unknown is the most frightening and impossible to grasp, but the difficulty is a whetstone to train himself.