Except for Yoriichi Tsugikuni four hundred years ago, no one could leave Muzan alive unless they were transformed into a demon by him.
Kagaya Ubuyashiki knew that Shimizu was strong, almost the strongest swordsman besides the originator of the Sun Breathing technique.
However, he wasn't sure if Shimizu, with the assistance of the other Pillars, could kill Muzan and survive.
Therefore, after the inheritance rights of the Demon Slayer Corps transferred from the Ubuyashiki clan to the Uesugi clan, mainly due to Shimizu's bloodline, the primary concern was resolving the issue of future heirs.
"As for the third matter, it concerns a personal wish of mine, *cough*, please forgive me."
Kagaya Ubuyashiki coughed as he said:
"Although it's somewhat unfair to Shinobu Kocho, I still hope that if you are still alive in ten years, you can marry both Kanao and Kanae. Your children will still bear the Uesugi surname, but you must pass the inheritance rights of the Demon Slayer Corps to your children with them.
The name Ubuyashiki can disappear, but I still hope that the bloodline of our clan can continue to flow, otherwise, I will have no face to face our ancestors in the afterlife.
You don't need to worry; women of the Ubuyashiki clan who marry outside the family rarely have children who inherit our clan's illness."
Shimizu's expression immediately turned strange.
Was this a condition or a perk?
Were they giving him wives as a bonus?
And three at that, two of whom were child brides!
If this wasn't the Demon Slayer world, Shimizu would have wondered if he was under a genjutsu.
"I don't seem to have a reason to refuse."
Looking at Kagaya Ubuyashiki's expectant gaze, Shimizu said.
"So, you've agreed?"
Kagaya Ubuyashiki asked.
"Lord, Gyomei will obey your command. Please forgive my frankness, but Lord Shimizu has slain Upper Rank demons twice, created the Sunlight Lamp, and awakened the Crimson Blade. His prestige among the Pillars is already very high. If it is him, everyone should accept it.
Once these two weapons against demons are widely used in the Demon Slayer Corps, greatly ensuring the safety of all swordsmen, everyone will support it."
A gentle smile from the heart reappeared on Kagaya Ubuyashiki's face.
"Then… I can rest assured."
… …
… …
【Current Luck Value: 47%】
In the Naruto world, Shimizu looked at the Luck Value, which had suddenly increased by a large amount, and a slight smile appeared on the corner of his mouth.
How long had it been since he opened the Marvel world? The Luck progress bar had already risen to nearly half.
Beside Shimizu, old lady Chiyo was also looking at the cell inside the glass window ahead with a smile.
A Kusagakure rogue ninja was clutching his head in pain, letting out a shrill scream, and constantly engaging in self-mutilation.
This seemed somewhat cruel and perverted.
But what made Chiyo happy was that the Fear Gas proposed by Shimizu had been completed.
When Shimizu brought back the Fear Gas formula, he first tried to replicate it himself.
Its effect on ordinary people, or ninjas with lower quality and quantity of chakra, was not bad, but that was all.
Ninjas' resistance to poison was actually not low. After all, the profession of ninja itself had a close connection with assassination and poisoning, and Sunagakure was the most prominent in this regard.
Chakra is a mixture of spiritual energy and physical energy, and the effects of poison on the spirit and body can be suppressed.
This thing is like the internal force in martial arts novels, but even stronger.
Unless injected in large quantities, Fear Gas would not be directly fatal. Its use was not to take lives, but to create chaos on a large scale.
To release it on a large scale, it had to be released in gaseous form and have an effect even in relatively small doses.
So Shimizu asked Chiyo to help.
In terms of medical ninjutsu, the strongest in the ninja world was Tsunade, but in terms of playing with poison, Chiyo was the best in the ninja world.
Even Hanzo, who was also skilled in using poison, was far behind Chiyo because he only knew how to use the poison of the Salamander.
On the battlefield of the Second Shinobi World War, the various poisons developed by Chiyo made the other ninja villages suffer a lot.
Excluding the Delicate Illness Extraction Technique, only Tsunade, who also understood pharmacology, was able to break down the toxin in a relatively short period of time.
After receiving the original formula from Shimizu, Chiyo began to analyze the pharmacology and reconfigure it using materials containing chakra until she came up with a finished product that she was satisfied with today.
"The effect lasts for more than half an hour. According to known information, this Kusagakure rogue ninja was a Chunin in Kusagakure before defecting, and his chakra content is not low. It can be basically assumed that this poison can effectively and quickly cause a unit to lose its combat power on the battlefield."
Chiyo nodded in satisfaction.
"Shimizu, this poison that you came up with out of the blue is not bad. It abandons the traditional principles of making poison. It's really good!"
Chiyo said "not bad" twice, which showed that she was really satisfied.
What was important was not this kind of poison, but that Shimizu also had the ability to develop new types of poison, inheriting her mantle.
"Chiyo-sensei, I think we still need to continue experimenting. If it is a Jonin with a strong will, I think that even if the Fear Gas can still have an impact, the effect may be much weaker. After all, the effect caused by our poison is more similar to genjutsu. When the opponent controls their own chakra disorder and uses the spiritual energy in the chakra to resist, they will still have a certain degree of resistance if their own will is strong."
Shimizu wrote the experimental records while speaking to Chiyo.
Chiyo first shook her head, and then nodded.
"Judging from the effect alone, it is already enough. Even among all the ninjas in the five major ninja villages, Jonin are one in a hundred. Even if the impact on Jonin and Special Jonin is weakened, it is enough to disable more than 90% of the manpower in a team. This is enough to determine the outcome of a war."
"However, we should indeed find a stronger Jonin to experiment with. On the one hand, to test the effect, and on the other hand, to find someone strong enough to try to extract some antibodies."
Speaking of this, Chiyo suddenly turned to look at Shimizu.
"*Cough cough!* Well, Chiyo-sensei, I'm not even fourteen years old yet, and my body hasn't fully developed. I'm far from being strong, you see…"
"What are you afraid of? Your teacher didn't let you go up."
