Konan asked, "The Valley of Hell? I've never heard of such a place."

Naruto smiled, "It's one of the Hidden Cloud Village's most closely guarded secrets. I only learned about it after becoming Hokage."

"Extreme heat, extreme cold—the climate there is incredibly harsh, making it a perfect place for training the body. Only the Raikage and their successors are allowed to train there. Enduring its conditions for a day can be equivalent to a hundred days of training elsewhere."

Konan was amazed, "Such a place must have a significant origin. Is it naturally formed? I can't think of any ninja capable of creating such a unique location."

Naruto shook his head, "It's not natural. It was created by a disciple of the Sage of Six Paths during his era."

Konan was even more intrigued, "A disciple of the Sage of Six Paths?"

Naruto's gaze deepened, "The Land of Lightning, where the Hidden Cloud Village is located, has close ties to the Sage of Six Paths. His descendants once flourished there..."

"Therefore, several of the Sage's tools were inherited by the Hidden Cloud. Even the infamous Gold and Silver Brothers had some Uzumaki blood in them, which I discovered while researching the Uzumaki clan's genealogy..."

"Not only the Valley of Hell, but also the True Waterfall on Turtle Island, a place for inner training, is controlled by the Hidden Cloud. I once went there to master Kurama's power."

Konan was concerned, "So, does this mean we'll have to clash with the Hidden Cloud? Let me go with you."

Naruto smiled, "No need. The Valley of Hell isn't in the Hidden Cloud Village but within the Land of Lightning. I know the location because I was invited there once in my previous life as Hokage."

"The environment there is so harsh that even I could only endure it by activating Kurama's chakra mode. It's not suitable for you, Konan-nee, so I'll go alone this time..."

"Of course, to avoid any unforeseen circumstances, I'll leave a clone in the Rain Village. It will be as if I'm still there."

Hearing this, Konan felt slightly reassured and advised, "Alright, be careful."

...

Land of Lightning.

After arriving via the Flying Thunder God Technique, Naruto traveled through the night and reached the forest outside the Valley of Hell by dawn.

As a heavily guarded area of the Hidden Cloud, Naruto didn't rush in but activated Sage Mode to scout the guards.

Among the Hidden Cloud's guards were sensor ninjas, but Naruto was currently outside their sensing range.

"Alright."

Naruto stood up, his body covered in purple lightning. He took a deep breath and transformed into a streak of purple light, darting towards the valley's depths...!

Swish!

A streak of purple light flashed past the Hidden Cloud ninjas.

"Did something just pass by?"

The narrative has been stolen; if detected on Amazon, report the infringement.

"There's no one there, it must be an illusion."

"I confirmed with my sensing, there's no one!"

"I told you, who else but Lord Raikage could move at such speed? But our Raikage is currently training in the Valley of Hell!"

"Let's continue patrolling!"

...

After passing through a misty area, the scene changed, and Naruto found himself in the Valley of Hell.

Surrounded by mountains, the valley had only one path leading deeper inside.

The sky appeared as if covered by volcanic ash, presenting a chaotic scene.

The intense heat made the air seem distorted.

Recalling his past visit, Naruto smiled, "Just like when I came here before, except that time I was invited, and now I'm uninvited..."

He proceeded along the only path.

The deeper he went into the valley, the harsher the environment became.

After about half an hour, a large training platform built into the mountainside came into view.

"I'll take it slow and adapt here first."

Swish!

Naruto jumped onto the training platform and slightly reduced the lightning covering his body.

Immediately, he began to sweat profusely, forcing himself to endure.

An hour later, the climate changed, with the heat replaced by intense cold. This sudden shift could cause an ordinary ninja's heart to burst.

Naruto looked around and created multiple shadow clones, using only a hundred this time to avoid any mishaps.

After a day and night of training, he dispelled the shadow clones.

"Alright." Naruto took a deep breath and tried to completely deactivate the lightning around his body.

Without the protection of the purple lightning chakra, Naruto found he could adapt to the environment, smiling in satisfaction, "Good... Let's go deeper!"

Leaving a Flying Thunder God mark on the training platform, he leaped down and continued forward.

Whenever he felt discomfort, he activated the lightning chakra for protection, reaching the second training platform and repeating the process.

Step by step, Naruto steadily advanced deeper into the Valley of Hell.

He knew the true essence of the valley lay in its innermost forbidden area.

His goal was to train in that forbidden area!

It took him ten days to reach the vicinity of the forbidden area.

On the tenth night, he finally arrived outside the forbidden area.

At that moment, the Fourth Raikage, A, was inside the forbidden area, vigorously striking a wooden stake!

This 'stake,' known as the 'Heavenly Thunder Stake,' was one of the training treasures of the forbidden area, rumored to withstand any attack without damage!

Moreover, each heavy strike would summon a corresponding lightning bolt to strike the trainee...!!

Boom! Boom! Boom! Boom!

The furious strikes were accompanied by thunderous roars...

Such a terrifying training method was monstrous!

"Uzumaki Naruto!! I'll crush you into pulp!!"

The Raikage, drenched in sweat, delivered a powerful punch.

Boom! Boom! Boom!

A massive lightning bolt struck, creating a crater where the Raikage stood.

After the lightning strike, the damaged ground automatically repaired itself.

"Huff, huff, huff..." The Raikage panted, wiping his sweaty muscles with a towel. After wiping, he tossed the towel aside, ready to continue.

"Hmm!?" He turned unintentionally and widened his eyes, seeing a familiar figure sitting on the steps behind him, gazing at him!

Naruto smiled, "Yo, we meet again, Raikage..."

The Raikage instantly bristled, "How are you here!!!!"

Naruto said, "Why can't I be here? The Valley of Hell isn't in your Hidden Cloud Village..."

The Raikage roared, "I mean, how did you get here unscathed!!!"

"Well, it's a long story." Naruto stood up slowly, "But I'm not here to cause trouble. How about this, you train in the north, and we leave each other alone?"

Crackle!

Lightning covered the Raikage's body.

"Are you kidding? I'll send you to hell!!!"

Boom!!!

He charged forward.

Naruto didn't dodge or use Shinra Tensei!!

Thud!!

He blocked the Raikage's strike with his arm!

Crack! Crack!

The powerful force cracked the stones under Naruto's feet.

Though surprised by Naruto's physical toughness, the Raikage didn't think deeply and pressed on, grabbing Naruto's shoulders!

"Got you, you're finished...!!"

Crackle...!!

The Raikage's lightning surged, and he roared, lifting Naruto overhead and slamming him down with all his might!

"Raaah... Lightning Bomb!!!"

Boom!!!

Lightning exploded, shattering the steps and spreading cracks!

No ninja had ever survived the 'Lightning Bomb'!

He believed Naruto would be no different!

Crackle! Crackle! Crackle!

But suddenly, purple lightning surged from the crater!

"What!?"

As the Raikage was stunned, Naruto, with hands covered in purple lightning, grabbed the Raikage's shoulders, stood up, and lifted the shocked Raikage overhead!

"This move is impressive, full of impact...!!"

Crackle! Crackle!

With a surge of purple lightning, Naruto slammed the Raikage to the ground...!!

—Thunderclap Bomb!!