Lightning-nature Chakra

Even though you are just a child we picked up, Feng Xun, you will always be the one and only pride in your old man's heart.

Oh right, before leaving I said I was going to celebrate your birthday, but now it seems I am going to break that promise. Rest assured, though, I have already prepared your birthday present. I know you cannot extract chakra yet, so I specially found a taijutsu master for you and asked her to teach you. That way, even if you cannot apply chakra to your taijutsu, you will still have a few more means of self-preservation.

As for your taijutsu teacher, do not be surprised! It is the flat-chested blonde beauty right in front of you. Never mind that she is not very old; her strength is the real deal.

Ouch, fine, your old lady just hit me again.

Finally, I want to tell you two brothers that the ninja world is vast. If you have strength, it is better to go out and see more of it. Not a single child of the Namikaze Household is a coward.

The rest of this will be taken over by your mother.

Minato, Feng Xun, do not listen to your damned father's nonsense. Your mother does not have any demands of you, nor do I need you to stand out. I only hope you can safely protect yourselves.

I hope to see you next at the Sanzu River when you are already grandfathers. (^_^)"

After reading the very last line, Feng Xun's vision blurred, and tears gushed out, dripping onto the envelope.

Soon, however, he wiped the tears hanging from his face and said with a huff, "Honestly, this just shows you guys really do not understand your son! I can already extract chakra."

As he spoke, Feng Xun pulled a sheet of chakra test paper from his bosom, faced the Memorial Stone, and gently channeled the chakra inside his body into the paper.

The previously flat chakra test paper wrinkled up, but other than that, there were no other changes at all.

At this, Feng Xun shrugged, not minding in the least.

The existence of the system meant his future direction was destined not to be centered around chakra, so the number of chakra natures made no difference to him.

As for why he was able to possess chakra, he owed it all to the existence of ki. During that first month when he had just acquired the system, he had pondered the differences between ki and chakra. When it came down to it, both should belong to energy systems of the physical body.

Yet, when Feng Xun had previously channeled ki into the chakra test paper by itself, the paper produced no changes whatsoever.

Thus, he arrived at a new perspective. He remembered that in his past life—whether in the original work or in fanfiction—it was said that chakra is a combination of spiritual and physical energy. If so, what was the source of ki?

Feng Xun deduced that ki was purely physical power. In Dragon Ball, the physical bodies of Saiyans deteriorated at an extremely slow rate. Had Goku not been the same age as Chi-Chi? When he was still young, Chi-Chi had already grown old and withered.

Whether it was Goku's massive physical training as a child or his gravity training of dozens to hundreds of times when he grew up, one could see from all of this that he was doing it to strengthen his own physical fitness.

With this hypothesis, Feng Xun began his experiments anew. He combined his inherently superior spiritual power with his ki, and then channeled both into the chakra test paper.

As expected, the chakra test paper underwent the changes he anticipated. Doing this, however, had one fatal flaw.

That was the issue of conversion efficiency. Putting aside the fact that this kind of conversion wasted a massive amount of ki, even the converted chakra could not last very long in the body. His body was like a funnel, only allowing the chakra to exist for a brief moment; given enough time, the converted chakra would dissipate on its own.

After displaying his possessed chakra in front of the Memorial Stone, Feng Xun walked back in front of the astonished Tsunade.

"Lady Tsunade, did you just say you had already read the contents of the letter earlier?"

"Ah, I didn't do it on purpose. I just accidentally saw it while I was organizing the letters." Tsunade's face flushed as she hurriedly defended herself.

Paying no mind to Tsunade's reaction, Feng Xun continued, "I saw in the letter that my old man asked you to be my teacher beforehand. You must already be clear on this matter."

Tsunade nodded, not knowing why the child before her was suddenly saying these things.

Could it be that he was afraid she would go back on her word and wanted to take the opportunity to apprentice under her right now?

"I want Lady Tsunade to forget the request entrusted to you by my father."

"Hm? Rest assured, I will definitely teach you." Tsunade nodded, but right after, she snapped back to her senses, looking at the boy before her with an astonished expression: "What did you just say?"

Feng Xun's remark not only shocked Tsunade, but even left Minato, who had remained silent all this time, looking utterly incredulous.

"I decline Lady Tsunade from becoming my teacher," Feng Xun calmly stated once more.

He had his own path. The direction of his advance was destined to be different from the ninjas of this world, so he did not need a ninja's instruction—even if this person was one of the famed Sannin, the princess known as "Princess Tsunade."

Princess Tsunade, rejected by Feng Xun, furrowed her brow. She stopped Minato, who wanted to advise Feng Xun, and spoke with a somewhat gloomy expression: "May I hear your reasons?"

She could not understand why anyone would refuse to become her disciple, especially when this person was merely a child who had just turned eight years old.

The invisible momentum radiating from Tsunade made Feng Xun feel somewhat uncomfortable facing her directly. Only then did he wake up to the realization that the woman in front of him was no nobody; she was Princess Tsunade, even if she was not currently at her peak.

She was definitely not someone he could toy with at his present age.

However, the arrow was already on the string and had to be loosed. Feng Xun feigned composure and said, "I acknowledge Lady Tsunade's strength, but I have my own path. I do not believe the path I walk is the same as yours, Lady Tsunade."

Hearing Feng Xun's explanation, Tsunade mused, "Could it be that because you can refine Lightning-nature Chakra, you feel you no longer need to spend too much effort on taijutsu?"

Seeing that Tsunade had found a ready-made reason for him, Feng Xun dearly wanted to just agree with it, but he knew that if he said that, the other party would surely raise objections.

Rather than that, it was better to make things clear from the start.

Glancing at the empty and deserted surroundings, Feng Xun redirected his gaze to Tsunade: "Next, I will make Lady Tsunade understand my true meaning, but before that, I must ask you to guarantee that you will not speak of what happens afterward."

Seeing the young boy act so solemnly, Tsunade curled her lip and disdainfully said, "Rest assured, I do not have the habit of leaking other people's privacy. So then? What are you going to show me?"