Naruto: I start with one door, and I can open it infinitely.

"I knew this would happen," Sasuke sighed helplessly. He had asked Kakashi before, but Kakashi wouldn't tell him, so he came to ask Lin Chuan.

"I do have an idea, are you sure you want to use it? It might bring back bad memories," Lin Chuan said, his visual illusion technique, the Naraku Sight Technique, might be useful.

Illusion, the technique of seeing the most terrifying image in the opponent's mind, can be used to strike the mind.

In any case, the awakening of the Uchiha's Sharingan is always driven by emotional stimulation, and any kind of stimulation will do; fear is naturally one of the emotions.

"I'm not afraid," Sasuke said firmly, looking at Lin Chuan. He was willing to do anything for power, and he could accept this method to awaken his Sharingan, even if it meant sacrificing some unpleasant memories.

"Alright, come with me," Lin Chuan led Sasuke to the riverbank, took out a bundle of thick hemp rope, and shouted to Sasuke, "Hand over all your weapons, I'm going to tie you to a tree. Will you accept, then we'll begin?"

"Can I ask why?" Sasuke was confused. Was it really necessary to do this after awakening his Sharingan?

"I will use genjutsu on you to affect your visual perception and make you see bad memories. What if you go berserk and attack me?" Lin Chuan helplessly spread his hands. He agreed to open Sasuke's eyes not on a whim, but rather to wait for Sasuke to open his eyes on his own or for Sasuke to come to him.

Sasuke's current strength is almost on par with his. His only advantage is the information gap. Anyway, Sasuke will awaken his Sharingan after the Land of Waves is over. He might as well do Sasuke a favor. Sasuke had already awakened his Sharingan when he wiped out his clan, but he didn't realize it.

Fortunately, the Anbu protecting Sasuke are no longer around. After all, Sasuke has the strength of a Chunin, so he's not really in any danger in Konoha Village and no longer needs the Anbu to protect him in secret.

"So that's how it is," Sasuke said. Hearing that it was a genjutsu that opened his eyes, he understood why he saw bad memories, because the night of the massacre of his clan was the one he least wanted to recall.

He believed Lin Chuan's words and trusted Lin Chuan as a friend, so he handed over his ninja tools and weapons. This was a trust built up over several years of friendship; he believed Lin Chuan wouldn't harm him and would even help him because they were friends.

"I'm about to begin. Look at me," Lin Chuan tied Sasuke to the tree trunk. After confirming that the tie was secure, he immediately raised his hand to form a hand seal and used the Naraku Sight Technique, which affected Sasuke's vision. Sakura was affected by this genjutsu and saw Sasuke's severely injured appearance.

Everyone has a past they don't want to remember. This illusion can evoke the deepest fears they don't want to recall. If it were used on Sasuke, what would Sasuke least want to remember? Need I say more!

Sasuke's most unbearable memory is the night of the Uchiha massacre. At that moment, Sasuke's eyes were glazed and filled with terror. His whole body was trembling, and his feet were constantly stomping on the ground. Clearly, he had seen something he didn't want to recall.

Indeed, Sasuke returned to the night of the massacre and witnessed Itachi Uchiha slaughtering his entire clan. His hatred erupted like a volcano, and he instantly completed the hand seals for Lightning Blade, charging towards Itachi.

But just as he charged forward with the Lightning Blade, Itachi grabbed him by the neck. Even though the Lightning Blade pierced Itachi's chest, it was no use. Itachi held him by the neck, slammed him against the wall, and uttered the same taunt he had that night.

"Foolish little brother, you're too weak..."

"Hate me, you foolish brother..."

"Hate me as a memory of regret..."

"Only by becoming stronger can you kill me. Become stronger out of hatred, my foolish brother..."

Suddenly, Sasuke, whose neck was being choked, instantly activated his Sharingan. In the real world, the black pupils in Sasuke's eyes also turned red, and the Sharingan opened up brightly, but it was a single-tomoe Sharingan.

In fact, Sasuke had already awakened his Sharingan on the night of the massacre of his clan, but he didn't realize it, which is why he wondered why it was so difficult for him to awaken it.

However, the genjutsu did not stop. Sasuke, who had awakened his Sharingan, felt an even stronger hatred for Itachi. Suddenly, an extra tomoe appeared in his red eyes, first in his left eye and then in his right, instantly awakening his double-tomoe Sharingan.

"Cough cough cough," Sasuke's eyes continued to turn red, even becoming scarlet, within the genjutsu world, as he cursed incessantly, "I'm going to kill you, I'm going to kill you, kill you, ahhh..."

In the real world, Sasuke drooled from the corner of his mouth, opened his mouth and let out a chilling roar, struggling with his limbs, but he couldn't break free of the ropes no matter what he did. Fortunately, not many people usually came here, so as not to see him abusing Sasuke.

Lin Chuan's genjutsu didn't stop. Since Sasuke had already opened his eyes, he might as well go all the way and help him activate the three-tomoe genjutsu. He wanted to see where Sasuke's limit was and continued to apply the Naraku Sight Technique to Sasuke, keeping him immersed in the genjutsu and confronting Itachi.

At this moment, Sasuke was already fighting Itachi Uchiha in the illusion. His fingernails dug into Itachi's flesh, and he even opened his mouth and bit Itachi's arm, his mouth full of blood.

Sasuke always believed himself to be a Chunin, while Itachi Uchiha was a Jonin. For the past three years, he had been constantly reinforcing the memories of Chunin and Jonin strength in his mind.

This resulted in Sasuke still being unable to defeat Itachi even in the genjutsu. Even with the Sharingan activated in the genjutsu, Sasuke still couldn't beat Itachi Uchiha.

Then Sasuke would crave even greater power. He saw the three tomoe in Itachi's eyes, and his hatred erupted once more. A massive amount of Yin Release chakra gathered in his brain, and the third tomoe in his red eyes appeared and disappeared.

In the end, hatred triumphed over reason, and the third tomoe steadily appeared, spinning rapidly in its eye socket like a small windmill turning in the wind, leaving Lin Chuan completely dumbfounded.

"Holy crap, is this a sign that the kaleidoscope is about to activate?" Lin Chuan stared at the three rapidly spinning magatama, which were about to connect when their speed suddenly slowed down, leaving him puzzled.

"What's going on? Is it because you don't have enough chakra? You, the reincarnation of Indra, are you short of chakra? It's true that each generation is worse than the last." Lin Chuan also wanted to try to see if Sasuke could activate the Mangekyou Sharingan. He reached into his ninja tool pouch, grabbed a handful of soldier pills, and stuffed them into Sasuke's mouth.

He had prepared a lot of military rations for Liu to train in swordsmanship, and now they've all benefited Sasuke.

But just as he stuffed the soldier's ration pill into Sasuke's mouth, the rotation of Sasuke's eyes stopped. His left eye finally settled on the three tomoe, while his right eye turned out to be a completely new Mangekyou Sharingan with a flower on it, unlike the six-pointed star Mangekyou Sharingan he would awaken in the future.

He seems to have inadvertently changed history, causing Sasuke to awaken the Mangekyou Sharingan ahead of schedule. It also seems that the abilities of his eye techniques have changed, no longer being Amaterasu and Kagutsuchi.

The abilities of the Mangekyou Sharingan are not fixed. If Sasuke had not inherited Amaterasu from Itachi Uchiha, the nature of his other Mangekyou Sharingan would be unknown.

The Mangekyou Sharingan, also known as the Eye of the Mind, can "perfectly" reflect and resolve the needs of the awakened Mangekyou Sharingan's owner.

Just like when Obito saw Rin Haruno killed by Kakashi, he felt that this world was an illusion and wanted to escape from it. Thus, Obito created a world that existed in both reality and illusion, and possessed the eye technique Kamui.

When Uchiha Shisui saw the conflict between his clan and the village, he hoped to change the mind of the radical faction within his clan, which led to the creation of Kotoamatsukami, a device that could change people's hearts.

Fugaku was the same; out of concern for his family's future, he awakened a pupil technique similar to "futurism".

Itachi Uchiha hoped to have great strength to resolve the conflict between the village and his clan, which led to the creation of Amaterasu, the strongest physical attack, and Tsukuyomi, the strongest genjutsu attack.

Sasuke's situation is similar to Itachi's. Itachi wanted power to resolve the conflict between his clan and the village, while Sasuke wanted power to kill Itachi. They had the same desire; they were both types who craved power.

Therefore, Sasuke's Mangekyou Sharingan is likely an amplification or power-type eye technique, since Sasuke's current desire is power.

It's unclear what the ability is. Sasuke exhausted his chakra in order to awaken the Mangekyou Sharingan, otherwise he wouldn't have only awakened one. The other Mangekyou Sharingan had to be extinguished due to insufficient chakra.

However, once Sasuke grows up, the other Mangekyou Sharingan will appear sooner or later, because the Sharingan is a pair and will awaken at the same time, but it cannot be manifested due to insufficient chakra.

He put Sasuke down, gave him some water, and was too lazy to continue training. He waited for Sasuke to wake up under the tree, curious about what kind of power-type ability Sasuke's Mangekyou Sharingan was.

Today, he verified the feasibility of using genjutsu to awaken his Sharingan. If he were to transmigrate into the Uchiha clan, he could use genjutsu to hypnotize himself and accelerate the awakening of his Sharingan.

Ah, that's awesome! It's so awesome to witness the birth of a brand new pair of Mangekyou Sharingan. I really wonder how exciting the Chunin Exams will be soon, and how interesting Orochimaru's expression will be.

"Orochimaru, are you satisfied with the new body I prepared for you?" Lin Chuan couldn't help but laugh just thinking about it, because it was really interesting.

To keep Sasuke from getting cold, he built a fire by the woods. Sasuke didn't wake up until midnight, when he raised his hand to cover his throbbing head and groaned in pain.

"Are you alright? You've already awakened your eyes," Lin Chuan said, reminding Sasuke of what they had done as he woke up.

"What? I've awakened my Sharingan!" Sasuke immediately picked up a burning torch, went to the riverbank to light it up, and clearly saw his Sharingan.

But his joy was short-lived, as he noticed that his eyes seemed different. He knew about the Sharingan, and the most he had ever seen in his clansmen's Sharingan was three tomoe, but he had never seen such a strange windmill-patterned Sharingan.

"What? Don't you recognize it? Haven't you heard of the Mangekyou Sharingan?" Lin Chuan got up and went to the riverbank. Seeing Sasuke staring blankly at his reflection in the river, he couldn't help but remind him.

"You mean? His kind of eye? Why is there only one?" Sasuke threw the torch into the water, stood up, withdrew his Sharingan, and looked at Lin Chuan. He really wanted to know if his eye was the Mangekyou Sharingan. Lin Chuan seemed to know something. How did the other party know so much, more than he, an Uchiha clan member, knew?

"It's because of his eyes, the reason he only has one eye. I don't know, maybe he didn't have enough chakra, so the Yin Release chakra in your body was concentrated to activate one Mangekyou Sharingan first..."

"Mangekyou Sharingan, so this is the Mangekyou Sharingan. Such powerful eye power, it feels so much stronger than the three tomoe in my left eye." Sasuke gently raised his hand to stroke his cheek. So Itachi possessed such power, and now he has it too.

"Don't be too happy yet. He awakened his Sharingan earlier than you, so he's definitely better at using the Mangekyou Sharingan than you are," Lin Chuan said, still trying to put Sasuke down even though he couldn't beat him now. "The Mangekyou Sharingan is different from the regular Sharingan. The eye power it consumes can't be recovered, and using it too much will make you blind..."

"I see, you know too much." Sasuke had only activated his eyes for a short while when he felt his eye power draining away and his chakra was starting to give out. Activating his eyes now would be too much of a burden for him.

"What? You want to kill me to silence me?" Lin Chuan stared at Sasuke with a half-smile. If Sasuke wanted to determine who was better and who was worse, he would play along to the end. After all, it was just a shadow clone.

"What are you thinking about?" Sasuke almost rolled his eyes. He wasn't a murderer; he wouldn't go so far as to kill the friend who helped him awaken his eyes. He explained, "We're friends. Tell me about these eyes. I want to know how much of my clan you saw during the time you disappeared..."

"Okay, tell me first, what kind of eye technique has this kaleidoscope awakened?" Lin Chuan returned to the campfire, where two grilled fish were being roasted. They could eat and chat at the same time.

Sasuke sat down by the fire and revealed his Mangekyou Sharingan without any wariness, "I can feel that this eye enhances my Lightning Release ninjutsu, providing a comprehensive boost when I use Lightning Release in battle..."

Lin Chuan secretly realized that it was indeed an amplification-type eye technique. When Sasuke encountered Itachi Uchiha in the genjutsu, he must have wanted to kill Itachi with power, so he awakened an amplification-type eye technique for lightning release. This was because Sasuke's lightning release was the strongest, and this was a thought that Sasuke had always had since he learned lightning release.

"Then do you know what this eye technique is called?" Lin Chuan continued to ask. He knew too little about the history of the Little Days and the gods, so how could he guess what the name was? According to the naming style of the Anbian, the eye techniques of the Kaleidoscope were usually named after the gods.

"I don't know. I can go back and check my family history. It's all kept in Konoha's archives. They shouldn't stop me from looking at it," Sasuke said, his eyes suddenly turning cold. No one could stop him from seeking revenge.

"That's a pity. You must tell me when you find out," Lin Chuan said with a grin. He was really curious about the name of this kaleidoscope and wondered if it had ever appeared in the history of the Uchiha clan.

"Okay, I have three more questions for you now." After Sasuke activated his Mangekyou Sharingan, he felt its power, which was far beyond what a three-tomoe Sharingan could provide. He realized that Itachi was even stronger than he had thought, and was not a Jonin at all. Lin Chuan had misjudged him.

But that didn't matter. His friend was too smart and knew too much. He still needed this friend, so he continued to ask...

"My first question is, how do I use this eye?"

"Secondly, how do I solve the problem of insufficient chakra?"

"Thirdly, I want to fight you..."