Obito Reborn With Double Kamui

From this, it is evident how important it is to have a good ancestor.

Of course, even if one does not have a good bloodline, it is not impossible to mutate one.

For example, by combining multiple chakra nature transformations, one can also create Kekkei Genkai¹ and Kekkei Tōta².

The Tsuchikage Ōnoki and the Mizukage Terumi Mei both followed this path.

Or, like him, one could transplant Hashirama's cells and grow stronger by obtaining someone else's bloodline.

Many people have attempted transplantation, including Uchiha Madara.

But the one who left the deepest impression on Obito was Yakushi Kabuto. That guy was undoubtedly a genius—he altered his own genes by transplanting the bloodlines of others, breaking the limits of mortals and advancing to a higher level of strength.

Obito had a deep fear of Yakushi Kabuto. Having mastered the Ryūchi Cave Sage Mode, he might have already surpassed ordinary Kage-level strength.

Therefore, throughout the entire ninja world, bloodline largely determines one's strength. If one does not possess a strong bloodline, they must find a way to obtain one. Even Madara had to bite off a piece of Hashirama's flesh to awaken the Rinnegan.

Aside from bloodlines, the second way to become stronger is through secret techniques.

In fact, many secret techniques are also tied to bloodlines.

For example, the three clans of the Konoha Ino-Shika-Chō formation—without the bloodlines of the Akimichi, Nara, or Yamanaka clans, learning their respective secret techniques is not impossible, but it is extremely difficult.

The Ay(Fourth Raikage) lineage of Kumogakure is considered a pinnacle among secret technique families. Relying on these techniques, every generation can reach Kage-level, and even among Kage, they stand as some of the strongest.

For instance, the Third Raikage—he fought against ten thousand Iwa-nin(Iwagakure ninja) until his death. Had he possessed large-scale offensive ninjutsu, the outcome of that battle might have been uncertain.

Beyond bloodlines and secret techniques, the third way to become strong is by having an enormous amount of chakra.

A sufficient quantity of chakra can lead to qualitative changes—when it reaches a certain level, one becomes an immensely powerful fighter.

Much of Kisame's strength stemmed from the chakra amplification granted by Samehada.

Of course, when speaking of immense chakra reserves, the most representative figures are the Jinchūriki.

Every perfect Jinchūriki is at least at the Kage level, while the Nine-Tails Jinchūriki surpasses even ordinary Kage-level strength.

The Ten-Tails Jinchūriki, in particular, is comparable to the Sage of the Six Paths.

However, becoming a Ten-Tails Jinchūriki is not easy—it requires not only a strong bloodline but also an exceptionally powerful mind and will. Otherwise, one would not even be able to suppress the Ten-Tails.

The fourth way to become strong is through the Konoha Academy system.

If someone has neither a strong bloodline nor the advantage of being a Jinchūriki, how should an ordinary genius become powerful?

The answer is: diligently complete all courses at the Konoha Academy and, if fortunate, receive guidance from a renowned teacher.

Due to its uniquely favorable conditions, Konoha is one of the more peaceful villages in the ninja world. As a result, ninjas born in Konoha generally have the opportunity to receive systematic training in the Ninja Academy for several years before graduating.

Do not underestimate systematic training. Although the Academy only teaches the most basic techniques, the more fundamental something is, the more it serves as a cornerstone.

Take the Three Basic Jutsu, for example.

The Three Basic Jutsu are not difficult to learn—one only needs to remember the chakra circulation pathways and practice a few times. Following the instructions, they can be performed, and for those with Sharingan, they can even be copied perfectly with just a glance.

However, the Academy does not just teach the Three Basic Jutsu; it also explains the principles behind them.

The Clone Technique and Transformation Technique both fall under the category of visual genjutsu—this is the most fundamental principle of illusion techniques.

The Body Flicker Technique utilizes reverse summoning to teleport a short distance—this is the most fundamental principle of summoning techniques.

The Substitution Technique builds upon the Body Flicker Technique, summoning an object to take the user's place in bearing an attack—this is the most fundamental principle of sealing techniques.

And the illusion, summoning, and sealing techniques underlying the Three Basic Jutsu represent some of the highest-level techniques in the ninja world.

These techniques can completely change the nature of combat.

Tailed Beasts are incredibly powerful—their sheer size and strength alone are enough to make ordinary ninjas struggle. On top of that, being pure chakra entities, they are nearly immune to most elemental jutsu.

Tailed Beasts also possess the Tailed Beast Ball, which can instantly destroy an entire village. Even Kage-level ninjas struggle to suppress them if they lack diverse techniques.

However, Tailed Beasts are countered by genjutsu and sealing techniques. They can also be summoned using summoning techniques. If used skillfully, these three techniques can turn what others see as a threat into an asset, becoming a trump card.

Beyond this, many high-level and even forbidden jutsu are closely tied to genjutsu, summoning, and sealing techniques.

Edo Tensei is a summoning technique.

Shiki Fūjin is a sealing technique.

These techniques can even completely change the course of a battle. But to learn them, a solid foundation is necessary—and these fundamentals are all taught at the Academy.

Furthermore, the Three Basic Jutsu demand precise timing for execution. Practicing them effectively hones a ninja's overall abilities, including observation skills, chakra control, chakra sensing, adaptability, and reflex speed.

Therefore, ninjas who truly master the Three Basic Jutsu become highly versatile fighters.

At first, such ninjas may seem weak due to their lack of powerful offensive jutsu.

However, as they continue to grow, the foundation they built early on becomes increasingly valuable. If they receive guidance from a skilled mentor at this stage, their well-established groundwork allows them to learn new techniques rapidly, sometimes achieving breakthroughs that leave others stunned.

Take the Flying Thunder God Technique, for example—Minato-sensei taught it to many people, including him, Kakashi, and Rin, but none of them managed to master it.

The principle behind the Flying Thunder God is this: using sealing techniques to mark a Flying Thunder God formula, then using sensory techniques to detect the mark, and finally, manipulating the chakra in the mark to perform reverse summoning for instant teleportation.

Alternatively, one could use sealing techniques to remotely draw a barrier, then employ sensory techniques and reverse summoning to redirect attacks.

Learning the Flying Thunder God requires exceptional chakra control, chakra sensing, proficiency in sealing techniques, mastery of summoning techniques, quick adaptability, and rapid neural reflexes—most importantly, a strong sense of spatial awareness.

Meeting all these requirements is extremely difficult. The Flying Thunder God is so intricate that even Obito, despite his unparalleled spatial perception, lacked the necessary foundation and never learned it.

In the entire history of Konoha, only Senju Tobirama and Minato-sensei have fully mastered it. Other ninjas, even those who understand its principles, can only manage to use it in coordination with multiple people to form the Flying Thunder God Formation.

Yet, every prerequisite for mastering the Flying Thunder God is honed through practicing the Three Basic Jutsu—without exception.

Obito thought that perhaps not being able to learn the Flying Thunder God was due to a lack of talent.

But surely not everyone failed simply due to a lack of talent.

More likely, many were like him—during their school years, they did not take it seriously. They did not put in enough effort, treating the ability to barely perform the Three Basic Jutsu as sufficient.

Later on, they moved on to practicing more powerful and visually impressive ninjutsu.

If he had put as much effort into practicing the Three Basic Jutsu as he had into learning the Great Fireball Technique, then given his later spatial awareness, how could he have failed to master the Flying Thunder God?

But, well, the Great Fireball just looked so much more impressive than the Three Basic Jutsu.

'Ah, if only I could go back and do it over.'

[1] Kekkei Genkai: Kekkei genkai (血継限界, literally meaning: Bloodline Limit) are DNA anomalies that allow their wielders to use unique techniques. A kekkei genkai's name describes both the anomaly and the resulting technique.]

[[2] Kekkei Tota: Kekkei tōta (血継淘汰, literally meaning: Bloodline Selection) is an advanced branch of jutsu that is more advanced than the jutsu class of kekkei genkai. The only known example is Dust Release, a combination of three different nature transformations — earth, wind, and fire.]

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