I, Uchiha Yu, am solely focused on cultivating immortality

Chapter 4 One Hundred Days of Foundation Building

Today marks the 100th day that Uchiha Yu has absorbed natural energy.

He sensed the change; the rate at which he was absorbing natural energy was increasing.

It wasn't actually his initiative; all the fire-attribute natural energies within the entire Konoha Village area, centered around the courtyard, were restless and actively converging towards him.

The fire-attribute natural energy automatically pushed aside other attributes, forming a red energy vortex that surged into Uchiha Yu's body and merged into his meridians without any hindrance.

That's too fast, it's just too fast.

[That's a little scary...]

But I don't feel any discomfort, so I should be fine... right?

No, it's too comfortable, I... can't stop...

The natural energy of the entire Hidden Leaf Village is surging.

If there were a powerful Sage Mode user in Konoha, they would be able to detect the terrifying vortex of natural energy and follow the flow of energy to find Uchiha Yu.

Fortunately, at this time, Konoha Village had no Sage Mode experts, or even any ninjas who could vaguely sense natural energy.

Hiruzen Sarutobi, the Hokage, was a born politician, while Danzo of Shinobi was obsessed with intrigue. People with dirty hearts are not qualified to feel natural energy.

Tsunade, one of the Legendary Sannin, was gifted; her grandfather was the strongest Sage Mode user, and she inherited her keen natural perception. However, Tsunade's heart was not at peace; she even developed hemophobia, a psychological disorder that made her unable to sense natural energy, as if a thick black cloth had been placed over her eyes.

Moreover, Tsunade has run away from home and is not in Konoha Village.

Jiraiya, the Toad Sage, possessed a pure heart and had mastered the Sage Techniques of Mount Myōboku. Naturally, he could sense changes in natural energy, but he remained in the Land of Rain, not in Konoha.

Orochimaru, the scientist, didn't truly understand natural energy until twenty years later when he found Jugo, a child who could automatically transform into a sage. He gained a direct understanding of natural energy, developed the Cursed Seal, and thus formally came to know natural energy.

Because no one knows, it is the safest place.

With no one to disturb him, Uchiha Yu gradually entered a state of complete absorption, his mind wandering in the void. The fire attribute energy in his meridians grew stronger and stronger, finally forcing out the last bit of chakra and returning it to his body's cells.

With only pure natural energy in the meridians, the red torrent naturally accelerates, generating a stronger suction force. More natural energy flows in, making the red torrent increasingly dense, gradually showing signs of misting.

Thick, atomized natural energy flowed rapidly through the meridians, converging towards the Ren and Du meridians in the center of Uchiha Yu's body in a state of tranquility and non-action.

Starting from the Qugu acupoint near the perineum, the Qi and blood rise upwards along the midline of the body, surging upwards and meeting at the head. After meeting, the Qi and blood are stirred, Yin and Yang are in harmony, and their nature undergoes a slight change.

[So this is what they call the convergence of dragon and tiger, the opening of yin and yang, it's really... awesome!]

After the natural energy converges, it turns around and continues to flow downwards along the Ren and Du meridians, passing through the Yin and Yang meridians of the human body, and converging again at the Qugu acupoint.

Two natural energies collided with each other, creating ripples that resonated with the area three inches above the Qugu acupoint, making the outline of the non-existent dantian increasingly clear.

[Is this the dantian I've been searching for so long but can't find? It turns out the dantian wasn't found, but rather opened up by myself.]

After the collision and shock, the natural energy will turn upwards again and begin a new cycle.

After repeating this process twelve times, Uchiha Yu lost all sense of perception as if struck by lightning. He inexplicably felt a rapid descent, and when he opened his eyes again, he found himself in a chaotic space.

The crimson mist billowed and rose in the space, like dark clouds looming over a city before a storm. The oppressive atmosphere weighed heavily on Uchiha Yu, and his light and tranquil state of mind gradually began to feel unstable.

He sensed a crisis; it seemed that if his mental state collapsed, he would face fatal danger.

At the same time, something was being nurtured within the red mist. Intuition told Uchiha Yu that what was being nurtured was the hope of escaping danger, and he couldn't help but urge it on.

[Hurry, hurry up! Whatever the change, hurry up!]

At the same time, he encouraged himself.

Hang in there, I won't die over something so trivial.

After an unknown period of time, suddenly thunder roared in the clouds, and the thick red fog condensed into red raindrops, which fell down in a drizzling sound.

Uchiha Yu's mind suddenly relaxed, and an unprecedented joy surged forth. Everything he felt and knew became clear and transparent, and he felt as if he were flying.

So awesome!!!

Although Uchiha Yu had never inhaled grass in either of his two lives, he felt that this was even more enjoyable than inhaling grass.

If this is what cultivating immortality feels like, then becoming addicted to it is perfectly understandable.

Just as Uchiha Yu was engrossed in cultivating immortality, more and more red raindrops appeared, growing larger and larger, and a torrential rain erupted in the space.

As the red mist rapidly faded and nearly disappeared, layers upon layers of red mist surged in from all directions, instantly transforming into a torrential downpour.

Uchiha Yu watched as water began to accumulate below. Despite the absence of any ground, the rainwater simply piled up out of thin air, forming a small puddle.

As the rainfall continued and the water surface gradually increased, Uchiha Yu's mind became clearer and clearer, breaking free from the intoxicating pleasure.

As he watched the puddles gradually fill up, his heart was filled with a deep sense of peace and joy.

This is the feeling of happiness.

When the body of water became large enough to be called a pool, the influx of red mist stopped, and the red rain gradually ceased.

Uchiha Yu felt himself rising involuntarily, his perspective getting farther and farther, his speed getting faster and faster, and soon he saw the whole picture of space.

It was an oval-shaped world, like an egg, with an upper and lower part, but no distinction between heaven and earth. Above was a faint red mist, and below was a shimmering pool of water.

[Dantian!]

Intuition told Uchiha Yu that this was the dantian, a miracle existing between reality and illusion, capable of accumulating natural energy.

Uchiha Yu had just condensed gaseous natural energy into liquid, greatly increasing the density and purity of the energy, which should be called Foundation Establishment.

[It has been exactly one hundred days since I absorbed the first red light point; one hundred days of foundation building.]

What would happen if we couldn't complete the foundation-building process today?

Uchiha Yu didn't continue thinking about it. He had already successfully established his foundation, and thinking about things that were impossible was pointless.

As the feeling of rising grew stronger, he suddenly regained consciousness and found himself lying on a bamboo couch in the posture of a reclining Buddha.

This was a sleeping position he unconsciously adopted. Although it was a strange and contorted posture, the natural energy flowing through his meridians made him feel unexpectedly comfortable.

It's like that wonderful feeling of comfort that comes from the muscle pain when you successfully perform a yoga pose and stretch your body to its limit.

He is now free of pain and therefore feels much more comfortable.

Wherever the natural energy in the meridians flows, it is like the earth being nourished by spring rain, awakening vibrant life.

Uchiha Yu felt every cell in his body rejoice, as the rich natural energy transformed into powerful resources for his cells, propelling his body to continuously transform into a stronger form.

It really is Foundation Establishment.

(End of this chapter)