Hashirama can instantly absorb a large amount of Natural Energy and enter Sage Mode. This is indeed very impressive.

Naruto initially couldn't directly enter Sage Mode, he needed a period of accumulation.

To solve this problem, he focused on Shadow Clone.

Later, Nine-Tails acknowledged Naruto, and Naruto relied on Nine-Tails for Sage Mode.

After losing Nine-Tails, Naruto's Sage Mode still seemed not very proficient. He still needed time to prepare before entering Sage Mode.

Perhaps Mount Myōboku's Sage Mode was always like this.

Kabuto, in order to enter Sage Mode, tortured himself into a state that was neither human nor ghost.

However, Hashirama's Sage Mode seems to be the best. He can instantly enter Sage Mode, and his facial changes are minimal.

This also made Kazuki more interested in Shikkotsu Forest's Sage Mode.

"Absorb blood? Will it be a lot?" Kazuki frowned.

If learning Sage Mode meant losing a lot of blood, then this Sage Mode might as well not be learned.

Kazuki highly suspected that Katsuyu would absorb his blood to help itself become stronger.

Of course, it would teach him Sage Mode, help him get stronger, and could even assist him in battle when needed.

Isn't it reasonable for it to gain some benefits?

Mutual benefit is what makes a relationship last.

It can't always be Kazuki gaining benefits from Katsuyu without any pay on his part, right?

"It won't be much, it depends on your Chakra volume."

"With your current Chakra volume, each time it might absorb about one hundred milliliters of blood."

Katsuyu mused for a moment before continuing, "You can prepare some blood-replenishing medicine to bring to Shikkotsu Forest."

"One hundred milliliters at a time?" Kazuki's expression froze.

In his previous life, the blood donation law stipulated that a blood donor's blood collection volume is generally 200ml, with a maximum of 400ml, and the interval between two blood collections should be no less than 6 months.

This is for adults, of course.

The physical quality of ninjas is different from ordinary people, especially ninjas with Six Paths bloodline like the Uchiha and Senju, their physical condition is no longer human.

It is well known that ninjas in the Ninja World have one hundred thirty trillion cells in their bodies, a number far greater than that of normal humans.

Losing some blood was nothing to Kazuki.

"If that's the case, I'm afraid I can't continuously learn Sage Mode." Kushina quickly reminded Kazuki.

Besides learning Sealing Jutsu and Taijutsu, she usually researched Medical Ninjutsu, thinking that if Kazuki got injured during future missions, she could help treat him.

Kushina's talent is naturally suitable for learning Medical Ninjutsu, she also usually reads Tsunade's medical books.

Kushina was aware of the importance of blood.

Kazuki said with a sigh, "I finally understand why Sage Mode is so difficult to learn."

"Perhaps after a few failures, you need to rest for several months before continuing to learn, and this will also affect your combat strength."

No wonder Tsunade didn't learn Sage Mode.

If he wasn't idle and clearly knew the power of Sage Mode, he wouldn't want to learn Shikkotsu Forest's Sage Mode.

"There is also a reward for the effort. Once Sage Mode is successfully learned, your strength will greatly increase." Katsuyu said softly.

"Alright, let's go." Kazuki didn't refuse upon hearing this.

In fact, he could perceive Natural Energy and knew that Sage Mode required combining the absorbed Natural Energy with his own physical energy and spiritual energy, balancing the three energies in a 1:1:1 ratio.

However, the specific operation still needed to be carried out under Katsuyu's guidance.

Moreover, Kazuki also hoped to research a Sage Mode suitable for himself based on Shikkotsu Forest's Sage Mode.

Ultimately, whether it's Ryūchi Cave, Mount Myōboku, or Shikkotsu Forest's Sage Mode, none are suitable for humans to learn.

Their Sage Mode was developed based on their own animal bodies.

How could humans be the same as summoned beasts?

Kazuki then turned to Kushina and said, "I'm going to Shikkotsu Forest. Kushina, please bring me food every day."

"Okay, leave it to me!" Kushina agreed without hesitation.

"If anything happens, remember to inform me at any time." Kazuki then looked at Katsuyu beside him.

"Slug Sage, please summon me to Shikkotsu Forest."

"Yes, I understand." Katsuyu's tentacles twitched slightly.

About half a minute later, Kazuki's figure disappeared from the scene.

"I feel like the gap between us and Kazuki is getting bigger and bigger." Nawaki said with a sigh when he saw this.

In fact, he had made significant progress recently, but Kazuki had already gone to Shikkotsu Forest to learn Sage Mode.

Once Kazuki successfully learns Sage Mode, he will become Konoha's top-tier powerhouse. And Kazuki is only ten years old now.

Why is the gap between people so big?

The most crucial point is that Kazuki is younger than him, and they all trained together.

"We also need to continue to work hard to get stronger." Rinka glanced at Nawaki indifferently, then continued training.

Rinka didn't have any particular fondness for Nawaki. At least, their interactions were always lukewarm.

Even towards Kazuki, Rinka didn't show excessive enthusiasm on the surface.

"Hmm, we'll have to train even harder from now on." Kushina clenched her small fist.

"Don't compare yourself to Kazuki, just being stronger than our past selves is enough."

"Also, don't just think about getting stronger. You also need to pay attention to other aspects, so you don't accidentally step on an Explosive Tag and disappear."

Teased by Kushina, Nawaki's face flushed.

"I told you, that was just an accident, and how could I disappear because of an Explosive Tag?"

"I've never heard of anyone being blown to death by an Explosive Tag."

"Hmph, you just need to understand." Kushina snorted lightly.

This wasn't Kushina deliberately trying to go against Nawaki. She was genuinely worried that Nawaki would die because of Explosive Tags. After all, he is too careless.

...

Bang!

A puff of white smoke flashed, and Kazuki appeared in Shikkotsu Forest.

Looking at the enormous Katsuyu, which was like a mountain, even Kazuki became startled.

***

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