After Uchiha En returned home, he eagerly opened the Ninjutsu scroll for the Rasengan.
Uchiha En had been coveting this technique for a long time.
The principle of the Rasengan is quite simple: it involves concentrating Chakra in the hand, making it flow continuously in irregular directions, and compressing it to form a palm-sized, non-elemental Chakra sphere to attack the opponent.
However, this technique was highly praised in the original work. Among all Ninjutsu that don't require hand seals, the Rasengan was hailed as an astonishing Ninjutsu that evolves with its user, possessing the strongest level of power.
Uchiha En was also interested in this co-evolution.
Initially, the Rasengan was just a normal A-rank Ninjutsu, and it was a non-elemental Ninjutsu.
During the Shippuden era, Naruto's Wind Release: Rasengan, which incorporated Wind Release nature transformation, had the power of an S-rank Ninjutsu.
Later, this technique was further refined until it incorporated Sage Mode and became the perfect Rasenshuriken.
By this stage, the Rasenshuriken could be considered the strongest Wind Release Ninjutsu in the Ninja World.
Not to mention the power it gained later when Naruto incorporated Tailed Beast Chakra and Six Paths Yang Power into the Rasengan.
Naruto used his Rasengan from dozens of episodes until the very end, and even in Six Paths level battles, the Rasengan could still be effective.
This is the miraculous aspect of this technique.
Uchiha En is also currently researching Chakra nature transformation. After learning the Rasengan, in a sense, it's equivalent to learning four different elemental S-rank Ninjutsu.
Originally, Uchiha En could have secretly learned the Rasengan himself, following the methods taught in the original work.
But now, Minato Namikaze's prestige and status in the Village are soaring. Plagiarizing his Ninjutsu at this time would be like lighting a lantern in a toilet – asking for death, wouldn't it?
That's why Uchiha En chased after him earlier. In his mind, he wanted to use the 'deceased' Obito to play the emotional card, build a good relationship with Minato Namikaze and his student, and gradually acquire the Rasengan.
As for Kakashi's Chidori, Uchiha En had already promised to help Kakashi get familiar with the power of the Sharingan, so it would be normal for Kakashi to demonstrate the Chidori then, right?
Then, Uchiha En would feign sharing Sasuke's developed Chidori derivative Ninjutsu with Kakashi. Kakashi would surely invite Uchiha En to develop these derivative Ninjutsu together, and then the Chidori would naturally fall into his hands.
By doing this, Kakashi wouldn't think Uchiha En was coveting his Ninjutsu; instead, he would believe Uchiha En was genuinely helping him.
This way, Uchiha En could further gain the favor of Minato Namikaze and his student.
Once Minato Namikaze became the Fourth Hokage, it would also be more convenient for the next steps.
Uchiha En's calculations were quite shrewd, but he never expected Minato Namikaze to trust him so much, directly giving him the Rasengan, which saved him a lot of trouble.
"Did Minato Namikaze not seal his own memories in the Land of Rōran either?" Uchiha En muttered to himself.
"No, that's not right. Minato Namikaze isn't that kind of person; he wouldn't do such a thing." Uchiha En quickly dismissed this guess.
But regardless, Uchiha En felt that Minato Namikaze's actions were most likely related to the Land of Rōran.
No one is good to you for no reason in this world; things like pies falling from the sky only happen in dreams.
Uchiha En recalled his few encounters with Minato Namikaze, and the only possibility for Minato Namikaze to show him special treatment was the journey to the Ryūmyaku.
And Minato Namikaze's memories were sealed by himself, so he couldn't secretly record what happened with his Sharingan like Uchiha En could.
Therefore, Uchiha En guessed that after Minato Namikaze sealed his memories, some remnants must have remained in his brain.
These remnants influenced Minato Namikaze, causing him to develop some trust in Uchiha En.
In the following days, to solidify this trust, Uchiha En went to Kakashi as promised.
Kakashi had only recently had the Sharingan transplanted and desperately needed someone to help him get familiar with its abilities.
Uchiha En didn't hold back, sharing his knowledge and experience with the Sharingan with Kakashi, and helping Kakashi familiarize himself with the Sharingan through sparring.
It must be said that Kakashi is truly an undeniable genius.
Especially his efficiency in familiarizing himself with new things is astonishing.
In just a few days, Kakashi was already proficient in using the basic functions of the Two-Tomoes Sharingan.
Currently, the biggest drawback of the Sharingan for Kakashi is that it cannot be deactivated, requiring a large amount of Chakra to maintain.
Frankly speaking, Kakashi's own Chakra reserves are not small.
Uchiha En had always allocated points separately for Chakra and Eye power; currently, Uchiha En's Chakra is 446.
446 Chakra is about 5 to 6 times that of Kakashi at this stage.
Kakashi is only 12 years old this year, and his Chakra reserves should increase further.
Uchiha En feels that his current Chakra reserves are about 4 times that of Kakashi when he first appeared in the original work, which is '4 Kakashi'.
Uchiha En's Chakra reserves are considered quite high among Uchiha Clan members who have activated the Three-Tomoe Sharingan.
For example, Uchiha Mei and Uchiha Aya from the Land of Bears battlefield do not have as much Chakra as he does.
Looking at it this way, Kakashi's own Chakra reserves are not small; in fact, among Ninja without a Bloodline Limit, they are quite substantial.
However, for an outsider like Kakashi, the Sharingan cannot be deactivated and requires constant Chakra consumption to maintain.
No matter how large Kakashi's Chakra reserves are, he would still be overwhelmed by the effort of maintaining that Sharingan.
Of course, the Sharingan doesn't just bring a burden to Kakashi. Once this eye awakens the Mangekyo Sharingan, Kakashi will be able to slowly grow into the Copy Ninja from the original work, thanks to the powerful dynamic vision of this Sharingan.
However, Uchiha En felt that Kakashi was somewhat wasting this Sharingan.
The dynamic vision of the Sharingan is best paired with Taijutsu. Kakashi himself inherited sword skills from the White Fang and is quite proficient in Taijutsu. Abandoning his most skilled area for a single Sharingan seems a bit wasteful.
Therefore, Uchiha En also subtly included some of his own agenda these past few days; he wanted to guide Kakashi towards Taijutsu.
White Fang's sword skills + Sharingan's dynamic vision + Chidori and its Lightning Release derivative Ninjutsu—a Kakashi growing in this direction would definitely be stronger than his original work counterpart, and even the embarrassing situation of having relatively low Chakra could be somewhat avoided.
Of course, a situation like Kakashi's is also very suitable for learning Lightning Release Chakra Mode, but as the saying goes, pies don't fall from the sky. Uchiha En would not gratuitously give such an important technique as Lightning Release Chakra Mode to Kakashi.
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