Speaking of the illusion - Sleeping Scene, Sakura said a little embarrassedly: "That illusion is too difficult. I still haven't mastered it completely. Are all advanced illusions like this?"

"No!" Mizuki denied Sakura's guess: "Regardless of physical skills, most of the advanced illusions and advanced ninjutsu are not that complicated. It's just that the unique secrets I taught you are quite special."

Mizuki looked at the confused Sakura and had to explain further: "Most of the ninjutsu in the ninja world was discovered by powerful ninjas with extraordinary talents and then passed down from generation to generation. In fact, the older the ninjutsu invented based on the use of chakra, the higher the requirements for qualifications, but the effect is not necessarily much stronger than the current ninjutsu. The reason for this is that most people have fallen into a misunderstanding, thinking that they will become powerful after learning those advanced ninjutsu, which is a big mistake. Nowadays, finding a special ninja that suits your path has much greater development potential!"

Mizuki's viewpoint seemed to be somewhat inconsistent with the tradition of the ninja world. Sakura couldn't help but ask in confusion: "Master, do you mean that the ninjas of today are stronger than the ninjas of the past?"

"That's not the case." Shuimu organized his words and continued, "The overall strength of ninjas is affected by many factors. The Ninja World War is the best training ground, and those who survived are the best of their generation. But the ninjutsu they used is not necessarily stronger than modern ninjas."

A typical example is the Second Hokage Senju Tobirama and the Fourth Hokage Namikaze Minato. The Shadow Clone Technique created by Senju Tobirama was developed by Uzumaki Naruto and even more varied by Mizuki. The Second Hokage invented the Flying Thunder God Technique, but the Fourth Hokage used it better. Impure World Reincarnation also originated from the Second Hokage, and Orochimaru perfected it, and it was only in the hands of Kabuto Yakushi that its power was brought to its fullest. But can you say that Orochimaru and Kabuto Yakushi are stronger than Senju Tobirama? Not necessarily.

Apart from the Mangekyō Sharingan and the Rinnegan, which have almost surpassed the upper limit of the rules of the ninja world and can no longer be considered bloodline limits of ninjutsu, it is really hard to imagine that thousands of years of accumulation would be worse than that of the ancients who slowly explored the use of chakra through fighting and killing.

Mizuki concluded, "Overall, ninjas may not be getting stronger, but the types of ninjutsu will become more diverse and their power will become stronger. The battles and tactics between ninjas today are much more sophisticated than they were decades ago. This is also an inevitable result of development."

"Eh!" Sakura barely understood what Mizuki meant, "Master, are you saying that most of the ninjutsu we are using now are stronger than those of our predecessors?"

"Yes, so the difficulty of learning is more difficult than that of our predecessors." After saying that, Shuimu changed the subject, "But the reason why my ninjutsu is so difficult to learn is not quite the same as this."

Mizuki sighed slightly and continued.

"Due to the reasons I just mentioned, you can clearly see that most ninjutsu are 'experience-based ninjutsu'. Through constant exploration and testing, the accumulated methods of using chakra eventually formed various ninjutsu, which were then passed down through family or master-apprentice inheritance. Unfortunately, I only know some basic ninjutsu from the ninja school. I have no inheritance, so apart from some basic ninjutsu, almost all conventional ninjutsu are trophies. That's why I had to develop my own ninjutsu and illusion based on sealing techniques and their derivatives."

"Inheritance?" As a ninja, even if she was a Genin, Sakura couldn't possibly not understand the traditions of the ninja world. "I see."

"You seem to have guessed a little. Just as you thought, generally speaking, it is very remarkable for a Genin to have accumulated more than ten ninjutsu. Without the inheritance of ninjutsu, it is difficult to obtain those 'experience-based ninjutsu' that have been tempered by time. Therefore, many ninjas, even if they have good qualifications and strength, still do not have any killer moves. They can only rely on plundering on the battlefield and exchanging resources with the village. As for me, you also know the path I took. I used the results accumulated from sealing techniques to break through the barriers with ninjutsu and illusion techniques, breath-holding techniques, concentration techniques, chakra shields, and illusion techniques - Xishuixiang all have this style."

There are no useful ninjutsu, and the aptitude is very average, so you can only create your own ninjutsu. The development direction of sealing techniques, which requires energy research and time accumulation, is more suitable for civilian ninjas with excellent intelligence. For newly created ninjutsu, more energy must be invested in the effect of ninjutsu, and the difficulty of learning will be much higher, and the universality will also be very poor.

Sakura didn't quite understand some of the truth, but she understood one thing: "In other words, will the task of learning ninjutsu be heavier in the future?"

Shuimu nodded affirmatively: "Learning is one thing, but the Sealing Technique cannot be learned by just thinking hard. Communication is also very important. With your ability, it is not a problem to learn the illusion I give you, but how long will it take? Have you ever thought about it? Self-study is one thing, but there are some things that I already know. Wouldn't it be faster to ask me? As for verification, it is much more convenient than exploring without direction. Recently, you have come to ask less about the difficulties of cultivation. Although I was not in the village this week because of a mission, it seems that you don't have too many questions that need my answers. Instead, you attach great importance to the scroll of concentration. Or are you sure that you can learn that illusion quickly and complete the assessment after the new year?"

As a master, Mizuki rarely lectured Sakura because of her personal behavior, but just a few short words made Sakura lower her head in shame.

Looking at Sakura's appearance, Mizuki couldn't help but sigh. Adolescent girls do some inappropriate things because of the troubles of love. Mizuki has never interfered too much. But from Sakura's reaction today, it seems that there are some problems in her practice in recent times. She pays too much attention to Sasuke's relationship with her, but doesn't pay much attention to the key points that she specifically reminded him of. Although she thought there would be such a problem, it's just...

"I really don't want to talk too much about these trivial matters. I feel like an old stubborn person who doesn't know the current situation..."

Seeing that Sakura didn't seem to want to argue, Mizuki opened the drawer behind the counter, pulled out a notebook with a red bookmark and no title on the cover and handed it to Sakura.

"This is the note I made when I was researching the Sealing Technique. Take it back and have a look. It should be helpful to you. If you have any questions, you can ask me as soon as possible..."