Caught seamlessly between Third Raikage and Tobirama, Naruto had absolutely nowhere to dodge and could only take their combined attacks head-on. His eyes narrowed sharply, and his aura erupted once more.
This time, the burning energy around Naruto had become so incredibly dense even an ordinary person could see it. He blocked Third Raikage's One-Finger Nukite with one hand and caught Tobirama's Hard Vortex Water Blade with the other.
The high-speed rotating vortex drill spun continuously against Naruto's palm, screeching as it tried to pierce through that dense energy layer and tear into his hand itself.
That thin energy layer simply refused to break, no matter how much force Tobirama exerted.
"Too bad your drill aren't that strong." Naruto sighed softly, then tightened his grip. Crushing the water-formed drill and Tobirama's arm together, detonating them both into mist. Following through the motion, he threw a devastating punch that completely obliterated Tobirama's Impure World Reincarnation body.
Compared to the minor trouble Tobirama had caused Naruto, the damage from Third Raikage's side was far more severe.
Third Raikage's index finger had struck Naruto's palm dead-on. Though Naruto crushed the Raikage's wrist almost instantly, Naruto clearly felt that he had actually been injured.
Opening his palm, he saw a tiny patch of skin peeled up. Naruto's expression gradually grew serious. Bright blood seeped from within the wound.
Keep in mind, Naruto had been fighting seriously just now. Aside from not activating his absolute strongest Yang Release Chakra Mode, he had been using his full ki energy, yet he still got injured. This alone vividly demonstrated the terrifying piercing power of the One-Finger Nukite.
This was his first real injury since he began training in the Turtle School martial arts.
Naruto rubbed his palm forcefully, tearing off the damaged, hanging skin. New skin quickly grew in its place. Even without actively training in Yang Release, he had Kurama inside him, his passive recovery speed could only be described as terrifying. So if you didn't look closely just now, you would have missed the fact that he had already completely healed.
Naruto could have easily altered Third Raikage's attack trajectory to safely counter the One-Finger Nukite, just like in the original timeline where the Raikage's spear broke through his own shield, but that held no real training meaning. So Naruto deliberately chose to take it head-on.
If his defense could be broken, it meant he still had major, glaring shortcomings. So...
"Continue the training."
"Third Raikage, I want you to use One-Finger Nukite every single time."
"Second Hokage, I want you to use your strongest Flying Thunder God Slash."
"Mu, I want you to unleash Weighted Boulder Jutsu with your full power."
At the same time, Naruto deliberately lowered his own energy level by one rank. If he didn't risk getting injured, the training would be entirely meaningless, it wouldn't achieve the desired tempering effect. Anyway, with Naruto's monstrous recovery ability, he would be back to normal soon enough.
"Three people aren't enough! Let's add more pressure!"
Naruto clasped his hands together again.
"Impure World Reincarnation!"
At Naruto's command, two more wooden coffins rose slowly from the earth.
"Let me see who has guts to summon me!?"
An arrogant voice echoed from the coffin. Golden and silver hair, whisker-like markings on their cheeks, and most importantly, two horns standing upright on their heads. These were Kumogakure's most vicious criminals in history, Kinkaku and Ginkaku.
But neither of them currently held the Sage of Six Paths' legendary treasures.
Mu's Weighted Boulder Jutsu trained pure physical strength, combat with Third Raikage honed raw battle awareness, and Tobirama's Bringer-of-Darkness trained energy perception. Interspersed with Tobirama's deadly forbidden techniques and Kinkaku and Ginkaku acting as emergency training for unexpected situations, it was a truly comprehensive, brutal training regimen.
Most importantly, with Impure World Reincarnation granting them functional immortality, Naruto could go all out without worrying about breaking their bodies. They were the absolute perfect sparring partners. Plus, by using White Zetsu as sacrifices, all five could effortlessly exert their maximum power at their peak.
Anyway, White Zetsu were everywhere. When needed, you could just grab a few from the dirt. Recycling is very important after all Naruto would have his children and grand-children in this world.
Back then, Madara could casually toy with the Five Kage single-handedly. Now, Naruto could take on three Kage plus Kinkaku and Ginkaku simultaneously. Although the opponents Naruto faced currently couldn't be compared in strength to the Five Kage that Madara fought.
In Dragon Ball-verse, Goku completed his grueling training on King Kai's planet, raising his combat power from a few hundred to over eight thousand. Now, doubling his own strength shouldn't be too much to ask, right?
Days passed, and under this intensive training, Naruto's strength also improved at a rapid pace.
As soon as he adapted to the combat and felt the pressure wasn't enough, Naruto would simply summon new Impure World Reincarnations. As time went on, the Impure World Reincarnation sparring partners grew more and more numerous. In between sessions, Naruto even found time to make a quick trip to the Land of Water and casually raided the Kirigakure graves.
In the end, the Five Kage of Wind, Fire, Lightning, Earth, and Water assembled, along with many vicious historical criminals and elites.
Roughly estimated, the Impure World Reincarnation sparring team had expanded to the size of a small military platoon.
Naruto figured that after some more time, he could finally summon Hashirama. Only that sheer level of opponent could bring faster, meaningful progress.
Watching Naruto constantly intensifying his brutal training outside, Kid Goku in the Seal Space also started clamoring to train.
This made things incredibly tough for Kurama. Shukaku had been tricked once, and after Kid Goku beat Shukaku until his head was covered in lumps, he stubbornly refused to ever visit Naruto's Seal Space again. So Kid Goku's only available training partner left was Kurama.
Eating, sleeping, and beating up Kurama became the daily routine.
"You're actively abusing a tailed beast! I'm going to tell my Father on you!" Finally, one day, Kurama, completely unable to take it anymore, pointed a claw at Kid Goku's nose and shouted angrily.
Kid Goku's eyes widened instantly, and he asked innocently, "So your Father, is he really strong?"
Faced with Kid Goku's eager question, Kurama fell entirely silent.
Sage of Six Paths was naturally strong, but Kurama honestly felt that even if he came, he'd be beaten until his head was covered in lumps before long.
To strictly prevent Hagoromo from getting beaten up, Kurama could only choose to bravely bear it all in silence.
Poor Kurama. The round belly he had worked so hard to grow over the years shrank away at a speed visible to the naked eye, and his body gradually became vastly more robust. Now, even without the Yang Release Chakra Mode, his entire massive body was covered in thick muscle.
He had become a full-fledged Devil Muscle Fox. Like changing manga artist from Naruto to Baki.
"This is bad, you brat. Something big happened."
That day, while Naruto was right in the middle of his daily training, he heard Kurama' frantic scream.
Naruto asked, "Huh?"
"Come quick to the Seal Space and see for yourself."
Naruto immediately dispelled the Impure World Reincarnation and hastily ended today's training session.
When he arrived at the Seal Space, he saw a familiar, tall figure he hadn't seen in years, radiating a familiar energy that was now countless times more powerful than before.
Kurama was huddled tightly in a corner of the Seal Space, looking utterly terrified. Judging from the huge, smoking bump on his head, he had been swiftly beaten. Meanwhile, in the center of the Seal Space, two figures in orange and yellow gis, Big Goku and Kid Goku, were staring intently at each other.
"Sensei!?" Naruto darted toward the Seal Space's entrance.
"Yo, squirt, long time no see." Goku, sporting that familiar glowing halo above his head, extended his right hand to cheerfully greet Naruto, the motion exactly the same as when they first met back then. "I didn't expect you'd grown so big."
Seeing Goku's familiar, grinning face, Naruto sighed emotionally.
'Just how many Son Goku's are going to be living inside me from now on?'
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