Mizuki was also a little surprised by Haruno Sakura's choice. However, it was quite good to be able to come up with a way to make up for her current shortcomings.

At present, the Breath Concealment Technique and Chakra Shield, which are the core ninjutsu of Haruno Sakura, both have a strong personal style of Mizuki, and are the type of ninjutsu that is easy to learn but difficult to master.

The Breath Containment Technique was relatively good. The degree of completion of a ninjutsu was only closely related to the amount of chakra that could be stored in the end and the difficulty of controlling it freely. The chakra shield was very obvious. As the creator of ninjutsu, Mizuki was already very skilled in using it. His defense ability was also very good in normal state. In the state of Sage Mode, the chakra shield enhanced by natural energy was an important support for Mizuki to stand firm.

However, in reality, the defensive power of this technique is closely related to chakra control, and it is not so easy to practice.

Ever since Sakura learned the Chakra Shield, during the Chunin Exam, this entry-level technique allowed Haruno Sakura to shine, and she effectively defended against Doss's sonic attack.

However, it has been so long since the Chunin Exam, and the strength of Haruno Sakura's chakra shield is still only good at defending against waves and energy, and can only be considered satisfactory for defending against ordinary physical attacks. It is actually powerless against slightly stronger attacks. In the final analysis, there is still a gap between Sakura's control and Mizuki. After reaching an extremely high level, every improvement in chakra control brings about a change in the power of ninjutsu, which is obvious.

However, even this slight improvement is extremely difficult. Just like the 100-meter race, if you improve from 13 seconds to 12 seconds, most sprinters can do it as long as they do scientific training. But if you improve from 12 seconds to 11 seconds, you need extremely rigorous training and a little bit of talent. With each improvement, the talent required becomes higher and higher, and the effort required will also increase exponentially.

There are very few people who can make this critical qualitative leap. Most ninjas cannot tolerate this situation where input and output are disproportionate, and turn to studying other ninjutsu that can quickly improve their strength.

Inspired by Mizuki, Sakura was able to find a new way to incorporate the change of chakra properties to make up for the problem of insufficient defense caused by the inadequate practice of her breath-gathering technique and chakra shield, which surprised Mizuki. Moreover, the chakra shield based on the breath-gathering technique that Mizuki improved was more flexible to operate, and in Sakura's hands, it could even achieve the effect of both offense and defense. Even the earth-attribute chakra property change that had just been introduced had already produced considerable attack power.

Watching Sakura carefully put away the Yin Healing Scroll handed over by Mizuki, Mizuki reminded her: "It is extremely rare that you can use this simple earth attribute chakra property change, combined with the breath-retaining technique and chakra shield to achieve this level. However, you have too many techniques to learn now. I have also told you that you should focus on one thing instead of another."

"I understand, it's just that the added defense of the chakra shield gave me this unexpected effect."

"Although changing the nature of earth-attributed chakra can greatly enhance defense and greatly enrich and strengthen one's own attack capabilities, the weakness is also quite obvious. You must be extra careful against lightning ninjas..."

The mutual promotion and restraint between species' chakra attributes are extremely obvious. The fighting style of the new technique developed by Haruno Sakura is a bit similar to Kakuzu who had fought with Mizuki, but because of the gap in physical skills and experience, it is definitely far inferior to Kakuzu who uses the earth attribute heart. Such a powerful Kakuzu, when facing other people, is like a human tank that is indestructible and invulnerable to swords and knives, but he was easily defeated by Hatake Kakashi's Raikiri.

Sakura's earth attribute chakra shield greatly weakened the defense against lightning escape and greatly strengthened the defense against other types of attacks. Compared with the mediocre chakra shield taught by Mizuki, its characteristics are too distinct. Mizuki, who only has a fire attribute bias, can't learn it himself and can only watch Sakura's iron fist waving vigorously.

"It seems that I need to develop my second attribute as soon as possible. I only have Fire Style, and even my disciples can't teach me!"

Earth escape technique itself is not weak, and there are no restrictions on its development direction. If you don't have advanced earth escape technique to improve your strength, you can also practice the changes in chakra properties and go the physical technique route.

Sakura's other attribute - water, is more suitable for the development of ninjutsu. There is no difference between the two different directions, it is more of a personal choice.

However, Haruno Sakura also has to take into account the practice of illusion and sealing techniques, and it is best not to abandon medical ninjutsu. Such a heavy task makes Mizuki a little worried. Although young people have a strong ability to accept, will too complicated and comprehensive development lead to overall mediocrity?

Mizuki also needs to think carefully and find some focus for this hard-working little girl.

After answering some of Sakura's questions during practice, Mizuki asked about Karin.

"Not far from Naruto's residence?" Mizuki asked Sakura in surprise, "So she and Naruto know each other?"

"Well, it just seems like the relationship isn't very good."

"Bad relationship?" This was a bit unexpected. Based on Kagura's intuition of seeking profit and avoiding harm, Karin should be closer to Naruto.

"It seems that Naruto really dislikes Karin and even said that Karin is an ugly girl with glasses!" Sakura was also very dissatisfied with Naruto's rudeness.

"Ugly girl?" Mizuki couldn't help but smile, feeling worried about Naruto's aesthetic sense. In this ninja world where the "Shamatte" were rampant, as long as someone dressed normally, it was already very rare in Mizuki's eyes. Currently, Karin, who was still very introverted and shy, really couldn't be considered an ugly girl.

"Naruto is such a horrible person. I think Karin actually wanted to deal with him, but it seems like Naruto was too rude and scared her."

"Really..." Mizuki had no interest in the children's playful interactions, and continued to ask, "What about Sasuke? Has he met Karin? Do they get along well?"

"Sasuke? I've met him twice, and he seemed quite ordinary." Sakura frowned and thought about it, but didn't find anything special between the two of them.

"Then you two should get along well. Karin, who has no relatives in Konoha, needs help right now."

Recently, due to the study of ninjutsu, the frequency of meeting with Karin has become less and less. Apart from Ebisu's instruction, Karin has a lot of free time with Sakura. Interaction with people of the same age is still more important than the care of elders.