The Dark Ido Belonging to Sasuke

What Kurama Yakumo saw was naturally not the real Ten-Tails; it didn't even qualify as a projection.

It was merely a product born from Sasuke's attempt to awaken the Mangekyō Sharingan by imitating the resentful inner demon "Ido" from the original timeline's Kurama Yakumo.

Sasuke had used the Id theory of the past-life psychology master Freud as his core, combining it with the psychology books of this world and Uchiha genjutsu hypnosis.

The Id is the earliest and most primitive part of the personality in biological genetics; it is a reservoir of biological impulses and desires, unrestricted by morality or right and wrong, seeking the maximum satisfaction of self-serving desires.

It is the sum of all psychological deposits fixed within the body at birth, consisting of repressed and rejected irrational, unconscious life force, inner drives, instincts, impulses, desires, and other psychological faculties.

In the West, the Id is known as original sin or the devil within, while in Eastern culture, it is referred to as the inner demon or the inherent evil of human nature.

Sasuke's practice of the Yoga Meditation Technique emphasized clearing away distracting thoughts, achieving a state of clear mirrors and still water, and immersing himself in a world of ethereal tranquility.

However, in order to catalyze his own inner demon, Sasuke would do the exact opposite after finishing his daily Yoga Meditation Technique, infinitely expanding the distracting thoughts, desires, and instincts within his heart—even resorting to self-hypnosis for better results.

He then spent over a year using the genjutsu of his Sharingan to collect and seal away the accumulated negative emotions.

A few days ago, the biological primitive impulses and inner desires Sasuke had been constantly accumulating finally manifested within his heart as a monster resembling the shadow of the Ten-Tails!

A monster from the depths of the Uchiha clan's genetic code!

"Sasuke-kun, do you know? If you do this, the negative emotions in your inner world will no longer be simple negative emotions, but will completely transform into your second personality—a personality of dark desires. It might even backfire on you and take over your body!"

Kurama Yakumo urged him anxiously; she truly did not want this young man to have his personality drastically altered, turning into a monster filled with resentment, vengeance, and desire.

Beyond sealing the five senses and creating demonic illusions, Kurama Yakumo's Kekkei Genkai possessed the ability to convert the illusory into reality. In the original timeline, she once drew a bolt of lightning on a painting of the Hokage Building, and as a result, the real Hokage Building suffered a lightning strike.

The negative emotions in her heart were so strong that even Kurenai Yuhi's seals had no effect, and the resentment and darkness continued to grow until they became her inner dark personality—Ido.

Eventually, Ido, an illusory entity composed of negative emotions, even detached from Kurama Yakumo's body and became a real monster capable of descending into reality.

"Let's just seal him away, didn't you ask me to do that before?"

The thing Sasuke had asked of her previously was for her to seal away the darkness within his heart.

Regarding this, Kurama Yakumo had been somewhat hesitant. In her view, everyone had their own hidden dark side, and blindly suppressing or eliminating it would only be counterproductive.

Moreover, a person completely devoid of a dark side could no longer be considered a complete human being.

However, it was only because of Sasuke's insistence that Kurama Yakumo had agreed, though she never expected the darkness in Sasuke's heart to be so terrifying, nor did she expect that Sasuke wanted to make his dark side real and release it.

"It does need to be sealed, but not right now."

Sasuke shook his head and replied calmly, "I am already aware of your concerns. Trust me, I will not be devoured by him; his power will instead be used by me."

Although Kurama Yakumo possessed the ability to convert the illusory into reality, it was obviously impossible for her to turn the shadow of the Ten-Tails in his heart into a real Ten-Tails based solely on a small fragment of his genetic code; a hundred or even a thousand Kurama Yakumos could not achieve that.

All Sasuke needed was to turn the shadow of the Ten-Tails into his own dark personality. The negative emotions in his heart were, after all, merely illusory things, born from his training and hypnosis.

Like flowers in a mirror or the moon in the water, they would shatter at a single touch. Only by relying on Kurama Yakumo could he turn them from illusion into reality, transforming them into the true dark side of his heart—a second personality.

He would become the Dark Ido belonging to Sasuke's heart!

"But..."

"Trust me, Yakumo." Sasuke's expression was much more serious this time.

"I still carry the blood feud of the Uchiha clan, and I bear the mission of reviving the Uchiha clan. Before achieving this goal, I will never allow myself to die, nor will I allow myself to be devoured by my own darkness!"

To demonstrate his resolve, Sasuke brought up the Uchiha clan in his words.

Hearing this, Kurama Yakumo remained silent for a long time. She glanced at the faint, looming monster, then at the resolute Sasuke, and sighed in her heart.

"Fine."

"Sasuke-kun, I'm starting now."

"Mm, thank you, Yakumo."

Kurama Yakumo looked at the twisted, maddened shadow of the monster, a look of worry flashing in her eyes as she quickly formed several hand seals.

"Genjutsu: True Reality!"

As Kurama Yakumo's technique was unleashed, a surging, turbulent airflow instantly rose within Sasuke's entire inner world, spreading out infinitely. Then, in less than a moment, it was as if the heavens were collapsing and the earth was shattering; the blood-red moon disintegrated, and the ground crumbled.

A massive amount of negative emotions—containing twisted madness, bloodthirsty violence, sinister malice, and impulsive desires—were continuously swallowed by the shadow of the Ten-Tails.

The shadow of the Ten-Tails let out roars of resentment, gradually condensing into a clear, unimaginably huge, sky-swallowing physical Ten-Tails.

How terrifying!

The moment Kurama Yakumo saw this materialized monster, she felt various emotions—pain, distortion, desire, fear, and resentment—rush into her brain like a tidal wave, causing her face to turn pale instantly and her mind to become a chaotic, buzzing mess.

What terrified her even more was that the most intense and abundant emotion coming from this monster was—devouring and plundering!

It was as if this monster had been born solely to devour and plunder!

Even the Yin Release Chakra that Kurama Yakumo had applied to the monster was devoured and absorbed in large quantities.

Sasuke stood calmly in front of Kurama Yakumo, blocking the pressure and intimidation brought by the inner Ten-Tails, allowing her to catch her breath.

Once the Ten-Tails monster took shape, it immediately opened a scarlet, hideous Sharingan and fixed its gaze on Sasuke.

Sasuke also stared back at it calmly, neither avoiding nor retreating. Man and beast stood there, silently locking eyes.

Suddenly, the body of the Ten-Tails monster began to tremble violently and collapse. Pieces resembling flesh and wood disintegrated continuously, and the body, once as large as a mountain, shrank smaller and smaller as it fell apart.

It was unknown how much time had passed, but the body of the Ten-Tails monster had completely disintegrated, revealing what lay within.