On the Nine-Tails Night, Shun single-handedly caught a Tailed Beast Ball and suppressed the Nine-Tails with two punches.
That god-like Susanoo, like a nightmare, was deeply imprinted in Obito's mind. This absolute power gap made him feel an unprecedented fear and longing.
In the dark underground cave, Obito caressed his left eye. This Three-Tomoe Sharingan, originally belonging to Madara, stirred another thought in his heart.
"I must get my eye back."
Shun's power was like a mirror, reflecting his own "incompleteness."
Obito believed that his plans were repeatedly thwarted not only because of Shun's intervention but also because he was not in a "complete" state.
If he could get his left eye back and gather the power of the twin Kamui, would he be able to contend with Shun?
This thought, like a venomous snake, gnawed at his heart. The craving for power overshadowed all reason and any lingering ties to the past.
"Kakashi, forgive me, everything is for Rin."
"Back then, if it wasn't for you, Rin wouldn't have died."
At this moment, Obito showed no past hesitation, a hint of ruthlessness appeared in his eyes. He had always kept an eye on Kakashi, so with Kamui's ability, he easily located him.
Land of Water, outside the new Konoha, a secluded training ground.
Because he was easily defeated on the Nine-Tails Night, Kakashi trained even more desperately.
At this moment, he had just finished an intense training session and was resting against a large tree.
Opportunity!
Space twisted silently, and Obito's figure quietly emerged from the tree trunk behind Kakashi, without a sound. His movements were as fast as lightning. His arm, covered in white material, went straight for Kakashi's left eye.
However, Kakashi was, after all, an Elite Jonin who had endured countless life-or-death trials, and his intuition for danger far surpassed ordinary people's.
Just as Obito's arm was about to touch him, he reacted almost instinctively, lunging forward fiercely, while lightning exploded from his right hand.
Chidori!
A piercing bird cry erupted, and dazzling lightning struck fiercely behind him.
Obito didn't expect Kakashi's reaction to be so fast, but his Kamui phasing ability was even better. Kakashi's Chidori passed through his body, striking the tree trunk behind and blasting a large hole.
And Obito's palm, in this brief moment of materialization, plunged fiercely into Kakashi's left eye.
"Ah...!"
Kakashi let out a painful scream.
Then, a hand chop struck the back of his neck, the intense pain instantly knocked him unconscious.
Looking at the Sharingan in his palm, stained with blood and showing the Three-Tomoe pattern, Obito coldly sneered, "Hmph, trash. This eye is wasted on you."
With his goal achieved, he activated Kamui without hesitation, instantly disappearing from the spot.
Only one-eyed Kakashi remained, collapsed on the training ground.
Inside the Kamui dimension, Obito's voice trembled slightly with excitement. "My Mangekyo, finally returned."
He carefully implanted this "recovered" left eye. The green light of medical ninjutsu flickered, connecting nerves and blood vessels, the process went smoothly.
However, when Obito eagerly channeled Chakra, attempting to feel the power of the Mangekyo, the anticipated power did not surge forth.
The sensation from his left eye was unusually stiff and distant.
No matter how hard he tried, his left eye was like an ill-fitting tool, completely unable to synchronize with his right eye, and even less able to activate Kamui.
"What's going on? Why can't I feel the Mangekyo's ocular power?"
Obito's heart sank, and a chilling fear instantly seized him.
He walked to a puddle, his reflection in the water showed that his left eye had three tomoe and appeared normal. Suddenly, a terrifying thought flashed.
Could it be that this wasn't his original eye?
From beneath Obito's mask, a cold name was uttered. "Kakashi, what did you do to it? Or, did someone do something to you?"
He had to find out. This time, he couldn't make another mistake.
Kamui activated, and space twisted.
Obito reappeared in the training ground, where Kakashi was weakly leaning against the tree roots, trying to recover his strength.
"You...!"
Seeing the masked man return, Kakashi's single eye instantly filled with vigilance and anger, he struggled to stand up. But Obito gave him no chance, his right Mangekyo spun wildly.
Genjutsu: Sharingan!
Kakashi's body instantly stiffened, the light in his single eye dissipated, and he fell into the Genjutsu world.
Obito's cold voice invaded Kakashi's mind. "Speak! Who tampered with your Sharingan?"
Under the control of the Genjutsu, Kakashi's mind couldn't resist and he answered haltingly, "The eye... two years ago... Shun-sama... sealed..."
"Shun..."
Obito's heart skipped a beat. It was him again. A terrifying conjecture that made him shiver instantly ran through his mind. He quickly retreated into the Kamui dimension, organizing his thoughts. That wasn't a seal, that was a complete deception.
Two years ago, Shun had already swapped out his Mangekyo, leaving only an ordinary Three-Tomoe Sharingan in Kakashi's left eye.
All the clues, at this moment, clicked into place.
Why, when he first met him, could Shun call out the name Obito?
Why did Shun know how to crack Kamui back then?
It was because he already possessed the other Kamui, he had already thoroughly studied the secrets of Kamui.
All of this was no coincidence.
Two years ago, he might have already fallen into Shun's scheme. That man had already seen through everything and laid out his pieces years in advance.
"Ugh... Ahhhh... Shun, why don't you just die?!"
The immense shock, humiliation, and fear made Obito completely lose control. He let out a roar mixed with anger and despair.