The moment Naruto Uzumaki's Tenseigan activated, his vision expanded to encompass his entire surroundings, including Sasuke's figure as it darted through the air.
Sasuke wasn't just using the Flying Thunder God Technique; he was alternating it with his Mangekyo dōjutsu. The combination was so seamless that it created the illusion that he was constantly teleporting, looking for the perfect opportunity to strike.
"Just like Kakashi-sensei's student!"
A smile appeared on Naruto's face. Without turning his head, his Tenseigan allowed him to see Sasuke appear behind him. He chuckled softly. "Honestly, he's just like Kakashi-sensei. Neither of them has that much chakra, but they both love to hold a Raikiri or a Chidori and just stand there talking."
"Jerk..."
Sasuke couldn't help but curse under his breath. He actually had a lot of chakra, but it was nothing compared to Naruto's reserves. He had paused to find the best angle of attack, but the sight of Naruto's new emerald-green chakra cloak caught him off guard. Had that guy secretly developed another new mode?
Sasuke's guess was correct.
The Tenseigan shared the Byakugan's main function, providing a full 360-degree field of vision with no blind spots. Naruto could see any abnormality from any direction.
When Sasuke's figure suddenly appeared in a new location, a spiral bullet instantly materialized in front of him, grazing past him by a hair's breadth.
"I saw you."
Several spiral bullets danced on Naruto's fingertips, quickly locking onto Sasuke's positions and forcing him to teleport away with the Flying Thunder God. However, each time Sasuke reappeared, a bullet would immediately shoot toward his location, making it impossible for him to escape Naruto's tracking.
"Naruto, your sensory abilities have improved again..." Sasuke's expression changed, and he finally couldn't help but ask, "You can sense my position the instant I appear?"
It shouldn't be possible. Minato Namikaze once said that even the powerful sensing of Sage Mode struggled to track a Flying Thunder God user. The movement of chakra leaves traces, which can easily interfere with a ninja's perception. For example, when he used Flying Raijin to appear in one spot, his chakra might still linger in another, confusing a sensory ninja's judgment.
"Because... I saw it."
Naruto slowly turned around. His eyes had changed to an emerald green, sparkling as if they held stars within, giving them a captivating look.
Sasuke subconsciously froze, staring at Naruto's eyes. He could clearly feel the dōjutsu power they contained and couldn't help but whisper, "Your eyes... Are they some kind of dōjutsu?"
"Yeah." The young Hokage tilted his head, making no effort to hide the information. "I used my absorption ability to take in a Byakugan and obtained the Byakugan's kekkei genkai. Then, I enhanced it with a huge amount of spiritual energy and got this crude pair of Tenseigan."
"...Tenseigan..."
Sasuke had never heard the name before, but he instantly recognized the grandeur in the name "Reincarnation Eye." He couldn't help but ask, "Reincarnation... what is the relationship between your dōjutsu and the Rinnegan?"
"They're different." Naruto turned his palm over and said softly, "But in terms of level, the Tenseigan should be a tier higher than the Byakugan and the Sharingan."
This was true. The Rinnegan was the evolution of the Eternal Mangekyo Sharingan, while the Tenseigan was the evolution of the Byakugan. They represented the ultimate forms of the two dōjutsu inherited from Kaguya Ōtsutsuki.
"Trying to scare me?" A smile touched the corner of Sasuke's mouth. The skeletal frame of a Susanoo began to form around him, his voice growing louder. "Naruto, the Uchiha clan's Sharingan is the greatest kekkei genkai in the ninja world. No kekkei genkai can surpass the power of the Sharingan! Susanoo, activate!"
A purple Susanoo materialized, holding a massive ninja sword that it brought down fiercely toward Naruto. The killing intent from the blade alone caused the earth to shatter.
Just as the sword's killing intent was at its peak, Sasuke's eyes shifted. His Mangekyo Sharingan activated, instantly shortening the distance between the blade and Naruto. It was about to cut him down. The sheer power of the move made the onlookers' faces pale. None of them were confident they could survive a direct hit from the Susanoo's blade. Tobirama Senju snorted, clearly unimpressed with Sasuke's fighting style.
However, only Sasuke knew that this move might be enough to scare Orochimaru's followers, but it was impossible to scare Naruto with it.
"Wood Style: Wood Golem Jutsu!"
Naruto slammed his hands together. A tall wooden golem rose from the ground beneath him, clasping its hands together to catch the Susanoo's massive sword.
The young Hokage didn't stop there, habitually following up with his two-part Wood Style combo. "Wood Style: Wood Dragon Jutsu!"
A wooden dragon slowly grew out from the golem's body, roaring as it coiled around the Susanoo's neck.
Sasuke stood within the Susanoo's protective crystal, a smirk on his face as he watched the wood dragon attack. He chuckled. "Tch, is that all? Susanoo: Flying Thunder God!"
The towering Susanoo instantly vanished. The next moment, it reappeared on the other side, beheading the bewildered wooden dragon with a swift slash.
Then, the Susanoo flew back again. A purple longbow appeared in its hand, and it fired a massive arrow that pierced through the wooden golem's body, nailing it to the ground. The tall golem immediately collapsed.
"What a pain..." Naruto frowned as he looked at the Flying Raijin being used in the air. He hadn't expected Sasuke's control over the technique to have reached this level. Before, he needed time to prepare, but now he could teleport the entire Susanoo with just a thought.
By the way, Naruto thought, just how many of Dad's Flying Raijin techniques did he teach Sasuke? Doesn't he know who his real son is?
"Naruto, do you feel it?" Sasuke called out from within the Susanoo, his voice full of self-satisfaction. "My strength has long surpassed that man, Itachi Uchiha! You can't stop me. What do you have left that can possibly stop me?"
"Give it up, Sasuke. I've seen Itachi's full power with my own eyes. You're not strong enough to defeat him yet." Naruto's face stiffened. He rubbed his brow and added, "And I don't want to use my other abilities, just in case I accidentally kill you."
"Naruto!" Sasuke's eyes grew icy cold, his face darkening. "Are you saying... you can kill me at any time?"
"..." The young Hokage looked at his enraged friend, his fingers unconsciously intertwining. "Probably... maybe?"
"Then come on!"
A flash of fury crossed Sasuke's face. The purple Susanoo instantly vanished from Naruto's sight, reappearing high above him.
In the sky, the perfect purple Susanoo raised its ninja sword and slashed down. Before the blade even fell, the sheer force of the air pressure caused the ground below to sink.
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Bonus:
Naruto: You can't beat your brother. Just give up.
Sasuke: I'm this strong, and you're still saying I can't win?
Naruto: Yeah.
Sasuke: What makes you say that?
Naruto: Can you guarantee you can beat Kakashi-sensei?
Sasuke: To be honest, I'm not very confident. He fights everyone to a 50/50 standstill. I feel like even with the Flying Thunder God Susanoo, I'd still be a bit scared to fight him. Is he hiding something...?
Naruto: Your brother can guarantee a win.
Sasuke: ...
Kakashi: ...