The Path to Sage Mode
Naruto didn't hesitate to accept the offer to learn Sage Mode. The idea of combining chakra, Reiatsu, and natural energy was too enticing to pass up. With each new technique, he felt himself growing stronger, more versatile. Aizen, observing from within, was equally fascinated. Natural energy was a stark contrast to Reiatsu—vibrant, life-giving, and full of potential. If he could master both, he might unlock a power beyond imagination.
Fukasaku Sage began the lesson. "Ordinary chakra is formed by balancing physical and spiritual energy. Sage Mode, however, requires you to absorb natural energy from your surroundings and balance it with your own physical and spiritual energy. The result is Senjutsu chakra, a force far more potent than regular chakra."
Naruto listened intently, his focus unwavering. Fukasaku continued, "The Sage Mode of Mount Myōboku, also known as Toad Sage Mode, lasts about five minutes. But be warned—if you fail to balance the energies, your body will turn to stone or take on the traits of a toad. Are you sure you want to proceed?"
Naruto nodded without hesitation. Fukasaku applied toad oil to his skin, helping him sense and absorb natural energy. Jiraiya watched nervously, recalling his own near-death experience during his Sage training. If Naruto succeeded, his power would skyrocket, potentially reaching Kage-level or beyond.
A Dangerous Transformation
Under the guidance of the sages, Naruto began to absorb natural energy. The process was smooth at first, the energy flowing into him like a gentle stream. But soon, the energy grew turbulent, swirling around him in a thick, white mist. Naruto's expression twisted in pain, and his aura shifted—dark, menacing, and filled with killing intent.
Fukasaku's eyes widened in alarm. "The natural energy… it's changing! It's being transformed into something else!"
Jiraiya stepped forward, his voice tense. "What's happening? Is he in danger?"
Fukasaku shook his head, his expression grim. "The natural energy is reacting with his Bloodline Limit. It's awakening something within him—a negative personality, perhaps. We can't interfere now. The energies are in a delicate balance. Any disruption could be catastrophic."
The Inner Battle
When Naruto opened his eyes, he found himself in the inner world of his Zanpakutō. The once-bright starry sky was gone, replaced by a thick, oppressive fog. The air was cold and filled with malice. In the distance, a figure emerged—a twisted version of himself, clad in white and wielding a blade.
"Jie jie jie…" The figure laughed, its voice dripping with malice. "Finally, I've returned! From now on, I'll be the king!"
Naruto's eyes narrowed. This was his inner Hollow—a manifestation of his negative emotions. It lunged at him, its blade slashing through the air with terrifying speed.
Naruto dodged, his movements fluid and precise. He drew Kyoka Suigetsu, the blade humming with energy. The Hollow sneered, its attacks growing more frenzied. "You're weak, Naruto! Let me take over. I'll destroy Konoha! I'll do what you can't!"
Naruto's expression remained calm. He sidestepped another strike, his blade flashing as he countered. The Hollow staggered, its chest caving in as it was sent flying. It crashed to the ground, its laughter turning to rage.
"Why?!" it screamed, clutching its wound. "Why won't you let me take control? I'm stronger than you!"
Naruto stepped forward, his voice cold and unwavering. "You're nothing but a beast, driven by rage and hatred. You'll never replace me."
The Hollow snarled, lunging again. But Naruto was ready. He parried the strike, his movements precise and calculated. With a swift motion, he disarmed the Hollow and pinned it to the ground, his foot pressing down on its chest.
"Trying to replace me?" Naruto said, his voice dripping with disdain. "Is this the best you can do?"
The Hollow struggled, its eyes burning with hatred. But Naruto's grip was unyielding. He raised Kyoka Suigetsu, the blade gleaming in the dim light.
"This ends now."
The Aftermath
Back in the physical world, Naruto's body shuddered as the dark aura dissipated. The natural energy settled, merging seamlessly with his chakra and Reiatsu. His eyes opened, glowing with a newfound power.
Fukasaku and Jiraiya stared in awe. "He… he did it," Fukasaku whispered. "He's achieved Sage Mode."
Naruto stood, his presence radiating strength and control. The Hollow's influence was gone, its voice silenced. He looked at Jiraiya and the sages, a small smile playing on his lips.
"Thank you," he said. "I'm ready for whatever comes next."