The Yin Seal

These techniques were already among the highest-level Medical Ninjutsu. They required the user to gather or release a large amount of Chakra all at once through the relatively fragile meridians of the human body. They demanded a profound level of precision in Chakra control and understanding of human anatomy, and could only truly be mastered after long, arduous training.

Otherwise, even the slightest mistake could cause severe damage to the user's body.

But Nagato wasn't a normal person. His Chakra control and understanding of his own meridians were exceptional, fully meeting the requirements for using the Yin Seal. On top of that, his Sage Body was far sturdier than an ordinary person's. As a result, even though he hadn't actually mastered the Yin Seal, he could use it just fine.

It was like this: when other people used Yin Seal Release, they were speeding along a narrow path on the edge of a cliff. They needed a high-performance vehicle and formidable driving skills, and only after they'd gotten used to the road and trained for a long time could they make sure they wouldn't crash and die.

Nagato, on the other hand? Sorry, he was speeding down an empty highway. Once he could get the car moving, he could drive as fast as he pleased. The road was straight, and he'd rebuilt the whole thing himself not long ago, so he didn't need any training.

Of course, his driving skills were basically those of a menace on the road. They couldn't compare in the slightest to an experienced mountain-road driver like Tsunade.

The difference was that Tsunade, who had truly mastered these Ninjutsu, could use the Strength of a Hundred Technique on herself and apply it to other people, healing them and replenishing their Chakra. Nagato couldn't do that. If he used the Strength of a Hundred Technique on someone else with his road menace technique to restore their Chakra, it would be no different from murder. He'd smash their meridians to pieces, guaranteed.

"Not bad. It's not that difficult a technique." Nagato gave a light cough, looking completely unruffled. He had no idea he was a menace on the road. As he tried to store Chakra in his forehead, he answered.

Honestly, he thought Sealing Jutsu and the like were just too easy. The Uzumaki Clan was exceptionally skilled at Sealing Jutsu to begin with, and he had the Uzumaki Clan's Sage Body. Instantly mastering the Yin Seal, a technique that had most likely been developed by the Uzumaki Clan, was only what you'd expect of someone who didn't want to bring shame on the Sage Body.

Just look at how the Senju clan's Sage Body performed. Hashirama Senju hadn't even bothered learning the Yin Seal. What did it feel like to run out of Chakra? He couldn't understand it at all. Hashirama said he'd never run out of Chakra in his life, so he had no idea what use a technique like the Yin Seal could possibly have. He'd rather spend that time gambling a couple more times.

Konan watched as Nagato instantly mastered an S-rank forbidden technique, yet still looked so calm and nonchalant. She couldn't help thinking that, without her even noticing, her friend's air of composure had grown even more impressive.

Tsunade stared blankly at the green mark on Nagato's forehead, then at his bright red hair, without saying a word. Her expression, alongside the mountain of dirty dishes piled up in front of her, made her look dazed and silly, like she'd eaten too much.

Hinata didn't care at all that the redhead Nagato had gained something else on his forehead. She only lowered her head, wearing a miserable expression as she dwelled on her troubles. Now she'd lost not only her Byakugan, but also the Gentle Fist training methods had been taken from her. The Hyuga Clan had never suffered such a huge loss in a thousand years. She couldn't even imagine how its members would react when they found out. Would they all get so angry they'd start hopping around in protest?

For a while, the two food-world assassins from Konoha fell silent.

"It may take me a long time to learn these techniques," Konan said to Nagato, eyes gently closed as she thought it over.

That was enough time for Konan to finish reading all the information in the memories and fully understand what the techniques actually did. She also understood why Nagato had copied the memories of these techniques for her: they were simply too powerful.

Even Strength of a Hundred, which was relatively simple and only required precise Chakra control, had immense destructive power and room for improvement. It wasn't easy to learn.

A technique like the Yin Seal, which stored large amounts of unused Chakra in the forehead, was even more difficult to master. Then there was the Strength of a Hundred Technique, which released the vast amount of Chakra accumulated over time through Yin Seal Release, and Creation Rebirth, which could instantly heal even damage to the internal organs through the power of that enormous Chakra reserve. Those were truly esoteric Ninjutsu of the highest order.

Medical Ninjutsu was already one of the most difficult disciplines to learn, and these techniques pushed it to the very limits of what Medical Ninjutsu could achieve. Their difficulty and effects were self-evident.

An ordinary ninja who learned these techniques could probably reach close to Kage Level strength, let alone Lady Tsunade. Konan knew very well that Tsunade was the genuine Princess of Konoha, with the purest Senju bloodline.

It seemed this Fifth Hokage was more than just a big eater, Konan couldn't help thinking. She even looked at Tsunade with a hint of reverence, thinking that it was no wonder she was one of the Sannin.

Just from the difficulty of the techniques Tsunade had mastered, Konan could tell how formidable she was. Under normal circumstances, she shouldn't fear anyone's challenge. If she hadn't run into Nagato, she could never have seemed so helpless.

There was no helping it. The so-called Kage Level powerhouses, whom the world had once defined as "the strongest," would all meet the same end if they ran into Nagato: death. Other Kage wouldn't have fared much better than Tsunade—some might even have done worse.

It was a complete double-sided crush in both ability and strength. Unless they could unlock a bloodline cheat, anyone who ran into Nagato, who had one foot in the Six Paths level, wouldn't even be able to fight back.

"Boss, should I go remind Kisame and Sasuke to hurry up?" White Zetsu asked from the side, his expression grim.

He knew exactly what kind of technique the Yin Seal was. Seeing Nagato master one of that level so easily right in front of him, White Zetsu couldn't help questioning his entire existence.

Was this guy even human? Nagato had been chosen by Madara Uchiha to inherit the power of Madara's Rinnegan. White Zetsu had never underestimated Nagato's talent or potential, but the ability he'd just displayed still exceeded all expectations.

At this rate, the Five Kage Summit would be no problem at all. Nagato could deal with it easily. And it would be even harder to use him to revive Lord Madara. White Zetsu was in a hurry to tell Obito the latest news and have him prepare.

Chakra reserves were the foundation of everything. No matter what techniques ninjas used, they consumed Chakra—even the Eight Inner Gates required Chakra. Now that Nagato had learned the Yin Seal, the amount of Chakra he could use in battle had multiplied. Unless monsters like Madara Uchiha or Hashirama Senju were revived, White Zetsu couldn't think of anyone in the world who could be his match.

Why was Hashirama Senju the God of Shinobi? Because he had too much Chakra. After an ordinary ninja traded a few blows with him, they'd be exhausted and ready to collapse, while his Chakra reserves would still be full. He replenished it faster than he used it. Aside from that reckless fool Madara Uchiha, who'd want to fight him?

Why could Naruto Uzumaki only use Shadow Clones and Rasengan, yet still beat people to death? Because a tsundere little fox secretly fed him Chakra. If one Rasengan didn't kill someone, he'd make a few more. He'd split into dozens of Shadow Clones at once, and sooner or later one of them would get lucky and hit someone in the face with a Rasengan.

So White Zetsu was starting to panic. He wanted to hurry off and ask Obito what they should do about Nagato now. The redhead already had a terrifying amount of Chakra, and now he had the nerve to learn the Yin Seal too. Talk about shameless. If White Zetsu had known this would happen, he should've secretly killed Tsunade beforehand. That old woman was nothing but trouble.