Chakra is the product of combining the body's physical energy with its spiritual energy.
This is the content recorded in the most basic textbooks of the Ninja Academy.
It is also knowledge that every ninja must understand.
However, very few people truly understand what Yin Release is, or what Yang Release is.
At this moment, Kakashi truly felt the essence of Yin Release.
Yin Release is an existence born from willpower and mental strength.
Its distinct nature allows it to grow continuously based on a person's insight, experiences, and perspective.
When a person has seen enough, understood enough, and possesses firm enough convictions, their Yin Release will far surpass that of others in power.
Just as Uchiha Shisui's Kotoamatsukami activated, the Yachihoko, which had long been inscribed upon Kakashi, was passively triggered at that very moment.
I will remain myself forever.
At this instant, a dōjutsu similar to a mental seal clashed with Kotoamatsukami.
Both were outstanding examples of Yin Release.
But...
Why was Uchiha Hikari known as the Uchiha's Ultimate Weapon?
Not for any other reason, but for the simplest one.
She was strong—very strong.
The Yin Release possessed by her Mangekyō Sharingan far exceeded that of the average Uchiha clansman.
Perhaps Uchiha Shisui's Yin Release was also beyond what ordinary Uchiha members could compare to, but in the face of Hikari's Yin Release, it was still somewhat lacking.
Kakashi could clearly feel Yachihoko gradually cannibalizing Kotoamatsukami.
The gap between their Yin Release was the gap between Yachihoko and Kotoamatsukami.
If Uchiha Shisui's Yin Release were strong enough, the result before them would inevitably be reversed.
When Uchiha Shisui's Kotoamatsukami was thoroughly erased by Yachihoko, Kakashi's eyes gradually regained their clarity.
He understood now.
Yin Release.
Why was the Uchiha clan so extreme?
The Sharingan is a product of Yin Release chakra. If a person's Yin Release is described as a calm water surface, then the Sharingan is the sea breeze. Because of the wind's existence, the ocean stirs up ripples, waves, surges, and even tsunamis.
While raising tsunamis, because of the Sharingan's influence, one's own Yin Release also grows continuously.
This leads to an unsolvable cycle: the stronger the wind, the bigger the waves; the bigger the waves, the stronger the wind.
Unless, after awakening the Mangekyō Sharingan, one transplants a new pair of Mangekyō Sharingan to form the Eternal Mangekyō Sharingan.
The Eternal Mangekyō Sharingan acts like a stabilizing anchor, suppressing the internal Yin Release and completely ending the extreme behavior of the Sharingan wielder.
Then...
What about Hikari?
Is it the same for Hikari, who does not possess the Eternal Mangekyō Sharingan?
Kakashi did not know at this moment.
He needed a deeper understanding of Hikari to know what form her Yin Release took.
Having thoroughly grasped the essence of Yin Release and the Sharingan, Kakashi calmly looked ahead at Uchiha Shisui, who was suffering in agony as Kotoamatsukami was devoured by Yachihoko, tears of blood streaming from his left eye.
"It seems I've won," Kakashi said softly, looking at the man before him.
"Won?"
"You were able to withstand the power of Kotoamatsukami... is it because of Miss Hikari?"
Uchiha Shisui looked at Kakashi, whose expression was calm and who showed no abnormalities despite having been subjected to Kotoamatsukami.
"Yes," Kakashi admitted frankly.
"I thought so. But did you think I would simply surrender just because of that?"
"I am... Shisui of the Body Flicker!"
Even with Kotoamatsukami broken and his Yin Release significantly diminished, and with the vision in his left eye beginning to blur, Uchiha Shisui still had no intention of giving up.
The person before him was a heartless beast.
For the clansmen, for the Uchiha, for Konoha.
He had to kill Kakashi here.
Uchiha Shisui's heart was filled with righteous indignation, his eyes bloodshot. His rejection of the man before him, combined with the life-and-death stakes regarding his clansmen—all of these things caused his Yin Release to rise once again!
Accompanying a roar like a wild beast, green chakra flames saturated his entire body!
Susanoo!
Layers of emerald-green skeletal ribs surfaced around him. Fueled by his unwillingness to accept everything, his hatred for Kakashi, and his struggle against fate, his Yin Release expanded at a speed visible to the naked eye!
As the emerald flames blazed ragingly, muscle wrapped around the skeleton, skin covered the muscle, and armor protected the skin!
A single crimson magatama was embedded in the chest!
Kakashi looked at Uchiha Shisui, who had already formed a half-body Susanoo, with a gaze as calm as still water.
The stronger the wind, the bigger the waves; the bigger the waves, the stronger the wind.
His understanding of the Sharingan was evidently correct.
But...
Shisui, just how long can your Mangekyō Sharingan last?
While he mentally marveled at Uchiha Shisui's strength—being able to manifest a half-body Susanoo even while suffering the backlash of Kotoamatsukami proved his extraordinary talent—Kakashi knew that if he wanted to win against Uchiha Shisui, he could choose to simply leave.
He could leave Uchiha Shisui to rage impotently.
Although Susanoo perfected both offense and defense to the extreme, it possessed a fatal weakness for ordinary Mangekyō Sharingan users.
Mobility.
Unless one unlocked the Perfect Susanoo, a half-body Susanoo was just a sitting duck.
Furthermore, due to the durability issues of the Sharingan, as time passed while Susanoo was active, the light of the Mangekyō wielder would drift further away from them.
Flames belonging to chakra burned fiercely upon the White Fang blade. Massive amounts of chakra surged outward with Kakashi as the center, kicking up waves beneath his feet.
Kakashi did not intend to defeat Uchiha Shisui's Susanoo by keeping his distance.
He wanted to see his current capability in frontal combat.
Kakashi intended to... break through Uchiha Shisui's Susanoo before it disintegrated!
"Here he comes."
With a soft whisper, Uchiha Shisui, situated within the Susanoo, stared dead-on at the direction of Kakashi's approach.
Although his speed is faster than before...
But... I can see him!
Look, this is the power the Uchiha has bestowed upon me; this is the power of the clan!
I will never allow the clan to be damaged because of you!
Green flames blazed furiously, and the crimson magatama on the chest of the half-body Susanoo suddenly erupted.
Susanoo: Tsukumo!
In an instant, countless green magatama projectiles rushed toward Kakashi like a blanket covering the sky and earth, centered from the magatama on the Susanoo's chest!
Interesting.
Kakashi's expression was grave. The White Fang in his hand danced wildly, its golden edges mingled with raging flames slicing through the green magatama one after another!
Countless magatama were deflected, splashing into the lake and crashing onto the shore, kicking up massive sprays of water and endless dust!
Seeing this, Uchiha Shisui was enraged to the point of splitting his eyelids!
This guy!
That bastard!
He could see it—although Wind Release had been added, Kakashi was using a secret technique of the Uchiha clan!
Uchiha Style: Dance of the Halo!
How dare he!
I'll kill you!
The Yin Release within his body surged violently once more, and a spiral sword resembling a drill appeared in the hand of the half-body Susanoo!
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