The plan has been decided. Compared with Naruto Uzumaki, who is somewhat 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 Hatake was still on the sidelines to prevent accidents, while Sasuke Uchiha sat cautiously in the small pool of the Waterfall of Reality, and then chakra and perception radiated outward.

After a while, Sasuke Uchiha, who closed his eyes, was wondering why he didn't respond. Suddenly, he felt something in his heart, then opened his eyes and looked at the waterfall of reality in front of him that was the same as before.

"It's already started!"

Silently, people unknowingly fall into the spiritual world. The Waterfall of Reality is indeed not a vain name.

Although the scenery is exactly the same as the outside world, the surrounding is no longer a real environment, but it is replaced by a spiritual space without people noticing it.

With the passage of time, the ninja captured by the waterfall of truth will fall deeper and deeper, and eventually, the fundamental evil obsession in the heart will be completely mobilized.

"It's been so long, it should be almost..."

Although Sasuke Uchiha, who has the eternal kaleidoscope writing wheel eye, has the ability to resist, if he does his best, he may be able to completely break through the spiritual space created by the waterfall of truth without falling into a deep situation.

But Sasuke Uchiha, who was willing to let go, still waited for some changes to happen slowly around him.

The originally sunny sky has become dark and obscure, and the faint gray mist, like shrouding the scenery in a layer of gauze, makes people feel a little unreal.

While Sasuke Uchiha was waiting, the water of the waterfall suddenly twisted, and Sasuke with two long swords, one red and one white, came out slowly, with a dark skin, lightning sword wings flashing on his back, and two long swords.

"Sorry for keeping you waiting, it's not easy to show up once!"

Kaleidoscope Shaker's strongest fighting stance before opening his eyes, Uchiha Sasuke's dark side appears in the spiritual space in this way.

Sasuke Uchiha frowned, looking at this familiar face.

"I used to look so ugly?"

Originally, his hair had turned an embarrassing lead-grey, and his skin had turned even darker. Not to mention, the distortion on his face due to the explosion of power, no matter how he looked at it, he didn't look like a kind-hearted teenager.

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

The dark side of Sasuke, who holds a sword in both hands, is too different from the body, and the sense of strangeness lingers.

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

Originally, the two were one body. The power of Real Waterfall itself is not strong, but it can lure the ninja who fell into it, divide his heart into two opposing parts, and then restrain and influence each other.

The incarnation of the dark side opposite Sasuke Uchiha, its strength does not depend on how much power the Real Waterfall has, but whether his reason can suppress the hidden desires in his heart.

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

The kaleidoscope writing wheel eye in Sasuke Uchiha's left eye appeared instantly, and where his eyes were focused, a dark flame suddenly rose from the foothold of Sasuke's dark side, which shrouded it in a blink of an eye, and after a while, it was burned to ashes.

"You dare to speak up even with such a little strength?"

"Really!"

A strange voice suddenly appeared behind the side, and the startled Sasuke Uchiha hurried to dodge, but his right arm was still cut out.

"How can it be unscathed?"

Although it is a spiritual space, the simulated Amaterasu black flames are still lethal. This is why spiritual warfare is very scary. If the damage to the spirit is strong to a certain extent, it can be directly fed back to the body through Chakra. If It is completely wiped out here, and it is very likely that it will really die.

"It seems that you haven't figured out the essence of the true waterfall!"

Taking advantage of the speed advantage of the Lightning Sword Wing, he suppressed Sasuke Uchiha's dark side incarnation while attacking and smiling.

"Your enemy is not the real waterfall, but yourself. If you can't find the real reason for my birth and eradicate it, I can't be eliminated here unless you die together!"

"So troublesome?"

Sasuke Uchiha thought while fighting. After a while, he raised his head and looked at the incarnation of the dark side dragging a long afterimage.

"It seems that ninjutsu duels and battles are just a means of delaying time, making me fall deeper, and distracting me from him. I take the liberty to ask, what will happen if I fail?"

"Hahaha..."We" are of course still safe and sound, but in the end, you don't know if you will dominate the will of the body in the future."

"How is it possible? This is obviously just a trial, there should be no such danger!"

"Dangerous, no, I think you got it wrong..."

Sasuke's dark side turned into a sinister smile on 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 existence as an individual..."

"You mean, will you replace me in the future?"

"Replace? I don't like that word!"

Sasuke's dark side avatar slowed down the rhythm of the attack slightly,

"Actually, we are one, it's just two incompatible points of divergence. Usually, I don't show influence on the will, but now, I can exist independently. Although it is not complete, it will be soon. ."

For the first time, Sasuke Uchiha was a little annoyed at his motive for rushing into the waterfall of truth, and it was a bit reckless.

"If I can't hold on, will I be invaded by my distorted will? And the depth of the impact depends on my consciousness!"

Meanwhile, Sasuke Uchiha has some doubts about the true role of Waterfall of Reality.

"If it weren't for ninjas who are extremely proficient in spiritual power, I'm afraid they wouldn't understand so much. People who are not sensitive to the shadows will not understand the real effect of this. What should this ability be called?"

"Who knows... However, some monks who pretend to be ghosts seem to know these things, such as baptism, inspiration, etc. This is probably the case. If it is an evil god, it is called charm, depravity, etc., but it is more common in the world. It’s easy to understand, I think the term brainwashing is the most appropriate.”

"Brainwashing yourself with the true will of your heart? It's really a nasty saying!"

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