Naruto: Chakra System

While Kakashi was eager to know if Sasuke's Sharingan would evolve, there was another thing also going on in Kakashi's mind. His Shadow Clones now dispersed, he gained their memories, from which he understood that it would only need one more day, and the Four-Symbol Seal would be cracked.

Now the question was, what should he do next? Either directly jump to merge this Four-Symbol Seal with the Storage Seal formula to create a new and unique Dimension-type storage seal; or start with practicing and creating the Eight-Trigram Seal by himself.

Since he knew the main formula of the Eight-Trigram Seal, just overlaps of two Four-Symbol Seals, plus there was also Naruto here, who had the Eight-Trigram Seal on his stomach, so he could even get some ideas from him.

Kakashi thought about it for a few minutes and decided, "Let's just make a Dimension-type storage seal first. That thing is most needed for now, about the Eight-Trigram Seal, that can be learned later after this is created." With this decision, he was at peace of mind and went to sleep.

—

The next day, at the training ground, his student Genin were present and were training by themselves, since for the next few days, they mostly had one task—to learn Body Flicker Technique. They greeted him and continued to practice Body Flicker Technique.

While he already discussed this with Sakura, that she could divide her day into training and Medical Ninjutsu learning, and she no longer had to do any D-rank missions, and obviously with Hiruzen's permission. Kakashi looked at them, and at last his gaze landed on Sasuke, but before he went to him, he saw that Naruto was practicing even Body Flicker Technique with more than 50 of his Shadow Clones.

Kakashi chuckled and thought, 'Now that I told him in which case Shadow Clones can be used, just like me he also is literally overusing his Shadow Clones.'

On the day when Kakashi told him and Sasuke that they could use Shadow Clones for increasing their efficiency in mastering Wall Walking and other things, he also explained to them fully how Shadow Clones could help. After all, Shadow Clones have many limitations, but they are very useful for training anything directly related to Chakra Manipulation alone.

So, these three still had to carry on with their physical training, and that too with Gravity Seals. While Sakura and Sasuke couldn't use Shadow Clones to practice Body Flicker Technique like Naruto, because Body Flicker Technique requires quite a bit of chakra when used, and even with Shadow Clones, it wouldn't change anything much for them.

Moreover, Sakura didn't even know Shadow Clone Jutsu, but Naruto was different in this case; his Chakra Reserves, even without the Yang-Half of Kurama sealed inside him, were vast, so he didn't have any problem with practicing Body Flicker Technique with help of dozens of Shadow Clones.

He wouldn't exhaust himself easily, and maybe with this dedication, he would also be able to master it at the level of Shisui and become second with that moniker, 'Naruto of Body Flicker'. Kakashi then moved towards Sasuke, who after continuous use and practice of Body Flicker, was taking a short break, sitting under the tree, in the front side of the sun.

Kakashi came and stood in front of him, blocking the sunlight at him and asked, "So, how did it go? Did your Sharingan evolve or not?"

Sasuke raised his head, looked at Kakashi, and replied, "Well..." He smirked and activated his Sharingan; it turned crimson and Two-Tomoe spun in his red eyes, glancing back at Kakashi.

Kakashi nodded but was also surprised a little; he didn't expect success exactly but it actually did. In the anime, Sasuke properly gained Two-Tomoe in both eyes, when Orochimaru attacked Team 7 at the Forest of Death, in the Chunin exams time.

Moreover, Sasuke had also used his Sharingan after first awakening it at the Uchiha massacre night, during the Bell Test. However, in the anime, Sasuke first used it after awakening was when he fought against Haku with Naruto, otherwise he had only suppressed it, because there was no need for him to use, between Uchiha massacre night to Land of Waves missions, Sasuke actually find no particular need for using his Sharingan.

This was also a little surprising for Kakashi, why Sasuke had used Sharingan during Bell test this time. Sasuke then asked, "Can... can you use that again, maybe this time I can evolve it even one more step further?"

Kakashi glanced at him and shook his head in denial. He explained, "The only reason I partially believed that it would succeed is because you had less Genjutsu resistance, and had only a One-Tomoe Sharingan."

"With now Two-Tomoe, your Genjutsu resistance is also increased, plus that Genjutsu was only D-rank, and used by me, otherwise that alone might not affect you if used by someone else who has less talent in Genjutsu."

Sasuke was a little disappointed but nodded in understanding. Kakashi then asked, "Then what do you think about all the things I told you last night?"

Sasuke stiffened a little. Even though he asked Kakashi to use Hell Viewing Technique at him again, the experience alone was also quite hurtful for him.

Plus, all the things Kakashi told him, he also thought deeply about upon waking up. He nodded and replied, "I did think about it, and I think you are right, I should focus on my life rather than revenge alone."

"However... unless I fulfill my goal of revenge, I might not be able to focus on myself or my own dream and life. I need strength to defeat him first, and I believe that you can help me grow that strong."

Kakashi replied calmly, "Of course I will, not only you but those two teammates of yours as well. Having a good teammate and rival is also good for personal growth, and for you, Naruto is that person."

A small, almost unnoticeable smile appeared on Sasuke's lips upon hearing Kakashi and looking at Naruto and Sakura, which didn't go unnoticed by Kakashi's keen eye.

Sasuke then looked back at Kakashi and asked, "But who is stronger? You or that... Itachi?"

Kakashi smiled, but it was hidden under his mask, unseeable for Sasuke. The answer for this for Kakashi was obvious; even with his Chakra ever growing, he couldn't defeat Itachi, atleast not for now, who had Tsukuyomi and the Susanoo which had Totsuka Blade and Yata Mirror.

While he also had Amaterasu, Kakashi didn't take it much seriously; after all, even in anime, the only person or more like a thing that was killed by it was White Zetsu. Many characters, like the Yondaime Raikage Ay, were able to dodge it or harm a little, but didn't die.

Moreover, most Fire Release Jutsu are proven to be dodgeable regardless of their ranks and power. Unless the enemy is restrained or Fire Release is used in very vast quantity of area like Madara's Fire Annihilation Jutsu, they can be dodged or countered easily.

And Amaterasu, despite being a Mangekyō ability, is just considered an S-rank Fire Ninjutsu. Despite that Kakashi isn't much sure to defeat Itachi easily, however, Kakashi couldn't say this out loud to Sasuke, otherwise, if he found that Kakashi couldn't help him grow, then in the future he might again chase after Orochimaru.

Thinking about this, Kakashi answered, "I can't say anything for sure about this, since I didn't fight with Itachi."

Sasuke immediately raised his brow, but Kakashi also immediately clarified, "I am talking about current Itachi. Before defection, he only had Three-Tomoe Sharingan, and he was no match for me, but now, I know he has the Uchiha Clan's legendary Mangekyō Sharingan. So, I can't say anything unless I fight him now."

Sasuke nodded, accepting Kakashi's answer, especially more when Kakashi confidently stated that before Itachi awakening Mangekyō Sharingan, he was no match for Kakashi. Though it wasn't completely true, but Sasuke didn't need all these details.

Kakashi then said, "Alright, continue your training, if you need my help, ask me right away." With that, Sasuke went back to training and Kakashi sat under tree shades, observing the three Genin, who were diligently practicing Body Flicker Technique.