More than ten minutes later, Uchiha Sora successfully refined the processed drop of blood into a bloodline seed.
After circulating it through a full major cycle, he planted it within his heart.
From that point on, with each circulation, he continuously absorbed and refined small amounts of natural energy through breathing, using it to nourish the seed and help it grow.
Under normal circumstances, this process would require a long period of time for the bloodline seed to sprout, develop, and eventually mature.
But Uchiha Sora was different.
Not only was his physique already powerful, with abundant vitality—
He also cultivated the Innate Technique, possessing a large amount of Innate Qi.
This allowed him to accelerate the entire process dramatically.
Acting immediately, he mobilized the Innate Qi from his lower dantian, guiding it into his heart and continuously infusing it into the Uzumaki bloodline seed.
As it absorbed this endless stream of Innate Qi, the seed began to grow and expand rapidly.
Crack… crack…
Within just a few minutes, it sprouted and began to develop vigorously.
Three hours later, after exhausting ninety percent of his Innate Qi reserves, he finally stopped the infusion.
While running the Innate Technique to recover, he observed the changes within his heart.
No—
It could no longer be called a seed.
It was now a bloodline tree.
This tree continuously absorbed and transformed his blood, strengthening it, gradually bringing it closer to that of a true Uzumaki.
At the same time, through the circulation of the Uzumaki Sage Body method and the natural flow of his blood, the vitality and unique traits of the Uzumaki physique began integrating into every cell of his body.
His physique underwent rapid transformation.
His life force surged.
Even his height increased by two centimeters in a short time.
And this growth would continue as the Uzumaki Sage Body matured, accelerating both his physical development and bodily strength.
Over the next month—
Uchiha Sora devoted most of his time and energy to cultivating the Uzumaki Sage Body, constantly accelerating its growth with Innate Qi.
[You used Innate Qi as nourishment to accelerate the Uzumaki Sage Body. Your Uzumaki Sage Body has reached perfection, achieving the full bloodline level of Kushina Uzumaki.]
[Your Kagura Mind's Eye received bloodline feedback, its proficiency skyrocketing to perfect mastery.]
What would normally take years—if not over a decade—to achieve was compressed into just over a month.
At this point, the bloodline tree within his heart had disappeared—
Or rather, it had fully integrated into every part of his body.
Whenever he activated the cultivation method, however, the phantom of the bloodline tree would still appear in his heart, pulsing rhythmically.
With the fully developed Uzumaki Sage Body—
His height had reached approximately 1.2 meters.
His physical condition had reached the level of a taijutsu-specialist jōnin.
Most importantly—
His life force had increased by more than tenfold.
And his Kagura Mind's Eye had also reached perfect mastery ahead of time.
"Unfortunately, due to the limitations of Kushina's blood purity, this is as far as I can go for now."
"To improve further, I either need higher-purity Uzumaki blood… or I must develop a method to refine and enhance the bloodline myself."
Deciding immediately, Uchiha Sora closed his eyes and began deducing a bloodline refinement technique.
With the Uchiha Bloodline Refinement Method as a reference, combined with months of research on the Uzumaki bloodline, progress came swiftly.
Half an hour later—
[Using the Uchiha Bloodline Refinement Method and your understanding of the Uzumaki bloodline, you have successfully deduced and created the Uzumaki Bloodline Refinement Method.]
Yet after absorbing the new technique, instead of feeling satisfied, Uchiha Sora frowned slightly.
"This isn't efficient…"
"With both Uchiha and Uzumaki refinement methods, I now need to spend separate time cultivating each bloodline every day?"
That was far too time-consuming.
And this was only the beginning.
In the future, he would likely develop cultivation methods for other bloodlines—Senju, Hyūga, and more.
At that point, would he need to train each one separately every day?
That would leave no time for anything else.
"I need to create a unified bloodline method… one that can integrate multiple bloodlines into a single system."
"If I can fuse all bloodlines together, then one cultivation method would be enough."
Uchiha Sora began contemplating deeply.
Of course, such a step would not be simple.
It would require more bloodlines and deeper understanding of their core principles.
"Slowly… no need to rush."
He chuckled to himself.
He was already progressing at an incredible pace—there was no need to be impatient.
Ending his cultivation, he got up, took a shower, and changed into a larger set of clothes.
With the completion of his Uzumaki physique, he had grown a total of seven centimeters—approaching 1.3 meters.
His previous clothes no longer fit.
Afterward, he left the underground lab and returned to the living room.
"Oh? You're finally out. If you didn't come out soon, I was about to drag you out myself. Why so long today?"
Mikoto Uchiha asked with concern.
She had already prepared lunch.
"I had a breakthrough in cultivation, so it took some time to整理—uh, to stabilize it. Mom, what are we having for lunch today?"
Uchiha Sora smiled, walked over, gave her a hug, and headed toward the dining table.
"Your favorites—braised pork and grilled fish. But wait a bit, your father and brother will be back soon."
She replied.
Then she looked him up and down curiously, even stepping closer to compare heights.
"Did you grow taller again? You've been growing really fast lately."
"Yeah."
Uchiha Sora nodded.
"I've been cultivating the Uzumaki Sage Body recently, so rapid growth is normal."
"But it's reached a temporary completion today, so it won't spike like this anymore."
Then he turned to her and said,
"Mom, I'll pass the Uzumaki Sage Body cultivation method to you and help you get started."
"This physique is excellent. It greatly enhances vitality and lifespan, significantly increases chakra reserves, and will also benefit the evolution of your Sharingan in the future."