Naruto: Copy System

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"Tsunade, are we going to continue our spar?" Shin asked.

"Of course. You think I'm afraid of a little brat like you?"

Tsunade's Chakra flared as she activated her Strength of a Hundred Seal. Her punches and kicks now carried monstrous power.

"Come on, show me what you've got."

Tsunade was taking Shin seriously now. After his display of strength and speed, she couldn't underestimate him.

She used the Body Flicker Jutsu to close the distance, then aimed a punch at Shin's face.

"Trying to rearrange my face, are you?"

Shin blocked the punch and grabbed her wrist, flinging her away.

"Fire Style: Fireball Jutsu!"

Shin unleashed a massive fireball, far more powerful than Mikoto's. It was a C-rank Jutsu, but in his hands, it rivaled a B-rank.

He had Mikoto to thank for this Jutsu; she had taught it to him.

"That's incredible!"

Mikoto gasped, her eyes wide. Shin's Fireball Jutsu was over ten times stronger than hers.

Tsunade, airborne, quickly formed hand seals and used the Substitution Jutsu, replacing herself with a log.

But the danger wasn't over. Shin appeared behind her, a Rasengan swirling in his hand.

"How is he so fast?"

Relying on her years of battle experience, Tsunade narrowly dodged the Rasengan.

"If I had used the Adamantine Sealing Chains, you'd be down for the count, Tsunade," Shin remarked.

The Chains would have restrained her, leaving her vulnerable to the Rasengan.

Tsunade had a weakness: her lack of long-range attacks. Relying solely on Taijutsu put her at a disadvantage.

"Where did you learn that Jutsu? It doesn't require any hand seals!" Tsunade asked, referring to the Rasengan. She understood the significance of a Jutsu that could be activated instantly.

"I created it," Shin replied casually.

Minato hadn't invented it yet, so Shin could claim credit.

"You're full of surprises. I thought you were a genius, but you're a monster."

"Is that a compliment or an insult, Tsunade?" Shin asked, rubbing his nose.

"Hmph, let's continue. I won't be defeated by a brat like you."

"Hold on."

Shin stopped her. He wasn't interested in fighting anymore. He had a good grasp of his strength now.

Besides, fighting Tsunade with restrictions was boring.

"There's no point continuing. Let's call it a draw."

Shin was being generous. If they continued, Tsunade would lose.

"You win, brat. I admit defeat."

Tsunade glared at him. She knew she couldn't defeat him. It was embarrassing, but she wasn't afraid to admit it.

"How did you get so strong?"

Tsunade was an elite Jōnin, bordering on Kage level. She might even reach that level soon.

But she couldn't defeat a ten-year-old? No one would believe it.

"That's the difference between a genius and an common person. Reality is cruel."

Shin's smug grin annoyed Tsunade.

Was she not a genius? She was indignant, but compared to Shin, she didn't seem that special.

No, that wasn't right. She was a genius; it was just that Shin was a monster.

"By the way, Tsunade, you mentioned a reward. I think we earned it." Shin smiled.

"You did. Here's the Strength of a Hundred Seal. Since I'm your sensei now, I should teach you something."

Tsunade handed them the scroll, surprising Shin. This was her signature technique.

Besides Medical Ninjutsu, the Strength of a Hundred Seal was what she was known for.

"But don't teach it to anyone else," Tsunade said sternly.

She was willing to teach them, but she didn't want it spreading.

"We're not idiots. We won't," Shin assured her.

"Thank you, Tsunade-sensei," Mikoto said gratefully.

"Look at Mikoto, so polite. She even called me 'sensei.' Learn from her, you two."

Tsunade glared at Shin and Kushina.

Kushina glared right back, while Shin focused on the Strength of a Hundred Seal scroll.

It involved precise Chakra control, focusing Chakra throughout the body, and releasing it in a burst of power, strong enough to shatter walls.

Shin studied the scroll and realized it wasn't that difficult. It was simply a technique for unleashing explosive power with Chakra.

"This is easy."

Shin focused, controlling his Chakra with ease. With his powerful mind and Chakra control, this was child's play.

He channeled Chakra throughout his body, feeling it coat him like armor.

So that was how Tsunade could withstand the recoil. The Chakra acted as a buffer.

This meant the Strength of a Hundred Seal wasn't just for offense; it could also be used defensively.

Tsunade gaped at him. She had been annoyed when Shin called the technique easy, but now he was using it! He might not be displaying its power, but she could tell he had mastered it.

But he was using it differently. She usually focused the Chakra in one area, like her fist or leg.

Shin, however, was channeling it throughout his body. Was this the privilege of having massive Chakra reserves?

"You really are a monster," Tsunade said, shaking her head.

"It's not that difficult. Anyone with good Chakra control can learn it."

Shin was telling the truth. The Strength of a Hundred Seal was powerful and versatile, but it was easy to learn, no harder than a C-rank Jutsu.

Of course, that was assuming you had excellent Chakra control.

Kushina and Mikoto also started practicing. They couldn't master it instantly like Shin, but with his guidance, they learned it within half a day.

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