Chapter 61: Haki Seed Implantation, Toya Lake Forged, and Mifune's New Beginning
No need for more words—Naraku decided to directly hand the Haki Seed to Mifune. Mifune could be said to be his first truly completely loyal subordinate in the ninja world. He would definitely pour massive effort into strengthening his subordinate's combat power.
Back in the forging room once again, Naraku recalled the Haki Seed manufacturing method. He then discovered that the Haki Seed production process was very simple.
All that was needed was to draw the secret technique curse seal on the Haki Cells, then roast it over high heat while hammering it fiercely. After cooling, it could be taken orally.
This left Naraku—who had studied biology in his previous life—completely stunned. One must know that on Earth, cell sizes varied greatly by type: from the smallest mycoplasma cells with a diameter of only 0.1–0.3 μm, to the largest ostrich egg yolk reaching up to 5 cm in diameter.
Naraku pulled out the Haki Cell—which was roughly the size of an adult man's head—and fell into deep thought.
Moreover, the high-temperature roasting and intense hammering in the manufacturing process were utterly ridiculous. For example: normal human cells and tissues can only withstand about 47°C.
Yet this Haki Cell could endure terrifying temperatures of thousands of degrees. Naraku could only admit: in this superhuman world, he really didn't understand biology anymore.
Next, Naraku created several high-level labor shadow clones to help with the work.
Naraku and three clones first carved the secret technique curse seal onto the Haki Cell together. Then the three clones handled the hammering, while Naraku held it steady for the high-temperature roasting.
Naraku looked at the still-black Haki Cell and knew the roasting wasn't hot enough yet.
He could only stand beside it and use Fire Release to raise the temperature of the Haki Cell. Naraku thought: looks like in the future he needed to find a place like a volcano. Otherwise, relying on ordinary coal heating wouldn't meet the forging temperature requirements for some materials anymore.
Three hours later, Naraku coughed twice.
Prolonged Fire Release had left his throat feeling like he'd just eaten ghost pepper.
Naraku looked at the Haki Cell in front of him—now reduced to 10 cm in diameter. According to the inherited memory in his mind, at this stage the Haki Cell was actually usable.
Naraku thought: should he make Mifune try harder? Just swallow this 10 cm diameter Haki Seed directly?
In the end, Naraku decided not to play the devil—because he was afraid Mifune's throat bones would break and he still couldn't swallow it.
Another three hours later, by now Naraku's throat had almost no sensation left.
The Haki Seed had shrunk to 5 cm in diameter. Naraku discovered that the smaller it got, the harder it was to hammer—especially when the temperature wasn't particularly high.
Although it still looked quite large now, Naraku believed that if Mifune tried hard enough, it should be swallowable. The average human on Earth could swallow objects around 5.5 cm in diameter.
Now it was only 5 cm, and since this world was a superhuman one anyway, it should be fine.
[Humble little author's life-saving disclaimer: Regarding any potentially dangerous behaviors that may appear in the above/below parts of this book—please everyone do NOT attempt them. If something goes wrong, you bear the consequences! This is a superhuman world—ordinary humans do NOT imitate!]
Naraku also thought: since Mifune had come all this way, it wouldn't do if he didn't give him a good sword.
This time, Naraku took out the Eternal Adamantine Wood again. Previously, Naraku had been thinking of adding some flashy materials to this Eternal Adamantine Wood. But since Mifune's future path of Haki was now set, he decided not to add any frills.
This nearly indestructible Eternal Adamantine Wood could grow stronger step by step along Mifune's path as a swordsman, eventually becoming his personal Supreme Grade sword!
Naraku added a little decoration to the Eternal Adamantine Wood—engraving the characters "Toya Lake" as a mark.
Ding...
[Congratulations, Forger has crafted an A-grade weapon: Toya Lake!]
Naraku appraised the sword in his hand once more:
[Toya Lake (A-): This sword was forged by the Forger in imitation of Gintama-chan's beloved sword Toya Lake. It uses Eternal Adamantine Wood, with no heart blood injected—only a bit of decoration and marking added. Although it is a wooden sword and unsharpened, it can still pierce people. The wooden sword bears the characters "Toya Lake." This sword is 1.4 meters long, possesses the "Durability" trait, and can smoothly conduct chakra and other energies.]
Naraku ignored some of the system's sarcastic wording. This system understood jack shit. Not using other materials was precisely to avoid insulting this Eternal Adamantine Wood!
Moreover, using only this Eternal Adamantine Wood showed how solid the materials were! How could this wiseass system understand his profound intentions!
As for why it wasn't sharpened—Naraku said that sharpening this thing was almost as hard as taking a rebar and grinding it into a needle with roadside stones. It was practically impossible.
In short, show me any other forger who can craft an A-grade weapon in just 2.5 minutes?
What does international ultimate invincible forger mean! Naraku struck a tactical backward lean pose!
...
The next day, in the reception room of the Uchiha clan grounds, Mifune respectfully looked at Naraku.
Naraku pretended to reach into his pocket—but actually took out the Haki Seed from his system space. Then Naraku handed the Haki Seed to Mifune.
At this moment Mifune's expression was a bit strange. From his perspective, his boss had reached into his crotch area, pulled out a black iron egg, and handed it to him.
Naraku didn't notice Mifune's subtle expression. He simply said calmly with a slight smile: "Mifune! The answer to saving the Land of Iron is inside this ball. Swallow it!"
Mifune hesitated for two seconds, but thinking of saving the Land of Iron, he endured the discomfort and swallowed the 5 cm diameter round ball.
What surprised Mifune was that after swallowing the iron ball, it disappeared inside his body. There was no discomfort, but also no feeling of growing stronger.
Naraku saw that Mifune didn't seem to have changed much and knew he probably needed some stimulation.
So Naraku pulled Mifune along to start eating grilled Sea King meat.
Although Mifune didn't understand why Naraku was doing this, he felt Naraku must have his deep reasons.
After the two finished the grilled meat, Naraku told Mifune: "I plan to give you a powerful weapon! In the future, you will grow together with this weapon!"
These words made Mifune's heart burn with excitement. What swordsman wouldn't want a weapon that could grow alongside him?
When Naraku handed Toya Lake to Mifune, Mifune was already somewhat numb.
This looked no different from a wooden toy sword that kids play with—except for the "Toya Lake" characters engraved on it, which left Mifune confused about what it meant.
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