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No wonder neither Konoha's intelligence operatives nor he himself had discovered the Uchiha family's underground chamber all these years. The true entrance could only be revealed by someone who had awakened the Mangekyō Sharingan.

"They hid it well."

Uchiha Rei stepped onto the stairs and slowly made his way down. Darkness surged in from every direction like a rising tide, as if it meant to swallow everything. But the red light of the Mangekyō Sharingan quietly appeared in his left eye. Even deep underground, where he couldn't see his hand in front of his face, his vision remained as clear as day.

The stone steps stretched on, seemingly without end. The damp air was thick with the smell of mold and rust, as if even time had frozen.

At last, a round stone chamber appeared at the lowest level.

A stone tablet stood quietly at its center, black as ink-dark jade, its surface shimmering with a faint, elusive light. Uchiha Rei slowly approached, and his heart skipped a beat. The tablet radiated a strange chakra, as if warning intruders away.

Do not approach.

"Is this the legendary tablet?" Uchiha Rei murmured, his eyes fixed on its surface.

There was nothing on it, as though it were just an ordinary slab of black stone.

But he knew it concealed the secrets passed down through generations of the Uchiha Clan—and the hidden history of the entire Ninja World.

Rei closed his eyes, then opened them again. Deep within his pupils, the Mangekyō Sharingan spun rapidly, as if it could see through every illusion.

Sure enough, words began to appear on the tablet, slowly materializing before his eyes.

"...Infinite Tsukuyomi is the true path to peace."

"Hmph." Uchiha Rei let out a cold laugh. "This drivel, altered by Black Zetsu, dares to call itself the truth?"

He continued to activate the Mangekyō, and the writing on the tablet grew increasingly complex as information began pouring forth in a torrent.

"Izanagi..." he murmured.

It was a legendary forbidden technique that could blur the line between reality and illusion for a short time, reshape fate, and even reverse death.

"If I had enough Sharingan... perhaps I could have as many extra lives as Danzo or Obito." Uchiha Rei spoke quietly, a trace of regret in his eyes.

"Unfortunately, Izanagi only lasts a few short minutes. It can't cure the poison in my body..."

"But the memories Uchiha Itachi revealed in his subconscious... those two sacred treasures, the Eight Shaku Mirror and the Totsuka Blade, both came from this chamber." He scanned the room, his gaze sharp as a blade. "The third one should be here too."

He began searching carefully. He checked every inch of floor around the tablet, every crack in the chamber's walls, even the grooves in each crevice.

But he found nothing.

"If it were that easy to find, Uchiha Itachi would have taken it already." He murmured to himself, but there was no disappointment in his eyes. Instead, a trace of excitement appeared.

"The harder it is to find, the more important it must be."

Where could the third sacred treasure be?

Uchiha Rei stood before the cold stone tablet, his Mangekyō Sharingan turning slowly as a glint of coldness passed through his eyes. He took a deep breath and formed Hand Seals. A flame sprang from his palm, illuminating the entire underground chamber.

Its light revealed every corner in perfect detail—the tablet, the stone walls, the floor tiles, even the dust and moss in the cracks.

And yet, there was nothing.

"Nothing?" Uchiha Rei frowned and looked around. "Not even a shadow..."

Suddenly, he seemed to notice something, and his gaze froze.

"Something's wrong," he murmured. "The shadows... they're not right."

He spun around and surveyed the chamber again.

"This tablet... doesn't have a shadow?"

In the pale blue light, the tablet should have cast a deep shadow behind it. But now—

There was nothing. As if it didn't exist in this world at all.

"There must be a reason its shadow is gone." Uchiha Rei's eyes narrowed, and his Mangekyō flared to life!

In that instant, the world seemed to split open, revealing another plane. He saw it: behind the tablet, where there should have been a solid stone wall, a hazy doorway rippled like water.

"This is it."

He walked behind the tablet and slowly ran his hand over its shadowless back. Sure enough, where light and darkness met, the doorway was quietly turning, as if waiting for him to arrive.

The doorway had swallowed the tablet's shadow completely.

Without hesitation, he stepped through.

Darkness instantly swallowed everything around him, endless and absolute. Only at the center of the chamber did a faint blue light flicker, like a spark in the night sky.

A blue-and-white Tomoe slowly spun in midair.

"The Yasakani no Magatama." Uchiha Rei murmured, his pupils contracting sharply.

The legendary third sacred treasure.

At last, it had appeared.

He reached out and carefully touched the floating Tomoe. The moment his fingertip met the light, the Tomoe turned into a streak of light and merged into his brow.

"Did it enter my Mental World directly?" He closed his eyes and sensed a new power deep in his mind. All he had to do was focus, and the Tomoe would appear from thin air.

Rei chuckled softly, a meaningful glint in his eyes.

"Since I'm already here, I might as well Sign in today. Perhaps this chamber can grant me an even more interesting ability."

A familiar system notification sounded in his ear.

[ Ding! ]

[ Sign-in initiated! ]

[ Current sign-in location: Uchiha Clan · Underground Chamber ]

[ Sign-in reward: Daofanshi! ]

"Daofanshi?"

Meanwhile, outside Konoha.

The bright moonlight poured down like water, casting the forest's branches and leaves as black shadows across the ground. A pitch-black figure slowly rose from one of the shadows, as if taking shape out of nothingness.

A pair of eyes gleamed with a cold light.

"You're late, Obito."

A low voice came from the shadow, tinged with displeasure and accusation.

"The plan ran into a snag." Obito's voice came from behind his mask.

"Hmph. Did that indecisive little genius, Uchiha Itachi, have a change of heart?"

"No. He was discovered." Obito spoke coldly as he took a scroll from Kamui Space and unfurled it.

In the moonlight, the words and photograph on the scroll came into view: Uchiha Itachi—S-rank wanted order.

"That fool." The shadow cursed, though a hint of unease crept into its voice. "He acted early, and Konoha's already hunting him?"

"He may have his own reasons." Obito's voice was low. "I have to make sure our most important piece stays on the right path."

"You've seen the tablet. You know what the true plan is," the shadow said slowly. "The Moon Eye is the only way... Only in that world of dreams can our clan, our loved ones, your Rin Nohara, and everything we lost return."

"Don't mention 'Rin' in front of me." Obito's voice suddenly turned cold, as if coated in frost. "In the real world, don't say her name again. The Dreamscape is where we'll meet again."

The air grew still. After a moment of silence, Black Zetsu's voice drifted out. "We have to prepare for the worst. The Eye of the Moon Plan needs both the Sharingan and that brat, Uchiha Itachi."

"I'll find him," Obito said, his tone like steel. "He won't escape our control."

As soon as he finished speaking, space shuddered. Vortex-like ripples rapidly spread around Obito, and he vanished, as if he had never existed.

Black Zetsu was left alone. Its form blurred, turned into a shadow, and slowly sank into the earth.

"Those poor Uchiha believed the tablet so devoutly, yet never knew who was pulling the strings."

His voice slithered into the night like a snake.

"Mother, just watch. Your resurrection is near."