As for cultivating Natural Chakra, that was even more impossible. After all, cultivating Chakra naturally required powerful spiritual control.
Madara Uchiha's sealing jutsu was practically the nemesis of Summoning Beasts. Especially for Summoning Beasts that had yet to mature—once they were sealed, it was difficult for them to recover. Moreover, this seal could be passed down through bloodlines. It was practically a sealing jutsu capable of destroying an entire summoning race.
Ren narrowed his eyes slightly. "How did the Uzumaki Clan come up with such a sealing jutsu? I didn't see this sealing jutsu in the scrolls Madara Uchiha wrote!"
Ren pondered slightly. Although he found it strange that Madara Uchiha had not left behind this sealing jutsu, he was not worried at all. If one were to speak of who was strongest in sealing jutsu, it was naturally the Uzumaki Clan. Ren knew Kushina Uzumaki, and behind Kushina Uzumaki stood Mito Uzumaki. Removing this kind of seal would be easy.
Compared to that, the ancient records contained several methods for lifting the seal. The Dog Sage had studied it and concluded that breaking the balance of the seal would be enough to undo it. If the flesh and blood cells of the Dog Clan became powerful enough, perhaps they could break through the seal.
Thus, the Dog Sage had even created a method to strengthen the body, using Natural Chakra to enhance one's physique. Unfortunately, when the Dog Sage strengthened the Dog Clan, they could only be enhanced once. If they were strengthened too many times, the Dog Clan would suffer erosion from Natural Chakra and become completely beastified.
Seeing this, Ren said, "So that's how it is... The enhancement that appeared last night was actually Natural Chakra. No wonder it hurt so much and worked so well. It was a strengthening technique created by the Dog Sage. Unfortunately, excessively using this method to strengthen the body will cause beastification."
Ren shook his head and set down the ancient text, gazing at the somewhat pitiful Ghost-Faced Mastiff King. If the Ghost-Faced Mastiff King gained intelligence and grew up, it would easily surpass Bunta in the future. After all, compared to dogs and toads, toads were pitifully weak. The same went for snakes. The gap between these Innate Races was not so easily resolved.
Ren patted the Ghost-Faced Mastiff King's head. "Don't worry... You'll soon regain your intelligence, and then you'll be able to keep growing stronger. Tomorrow, I'll ask Kushina Uzumaki about it. Hopefully, I can obtain a way to remove the sealing jutsu. And even if I can't find a way to undo it, I still have methods to continuously strengthen your blood and cells, allowing you to break through the seal yourselves!"
He spoke confidently, then stood and walked out of the cave.
Ren was not joking. He was serious. He still had several tons of Magical Beast meat, and since that meat could strengthen a human body, it could naturally strengthen the Dog Clan's bodies as well. Once their physiques became stronger, their cells could be strengthened. Perhaps they could break through the seal. Besides that, Ren had other methods, such as the Foundation-Building Spirit Liquid he had found among the Battle Through the Heavens garbage. That could also strengthen the body. Unfortunately, Ren did not yet know the effects of the Foundation-Building Spirit Liquid. He feared its violent energy would damage the body, so he had never dared use it. He did not even dare experiment with it. There was only a little of the Foundation-Building Spirit Liquid, and Ren did not understand Medical Ninjutsu, so he did not even know how to test it.
Not long after, Ren arrived at a place on Beast King Mountain.
"Woof! Woof!"
The Ghost-Faced Mastiff King barked, and Ren smiled. "Oh... So this is the useless land of Beast King Mountain?"
Through the summoning contract, Ren could understand what the Ghost-Faced Mastiff King meant.
The barren land before him was Beast King Mountain's useless territory.
Ren stared ahead and said, "This will do! Trash Station, dump out all the useless garbage!"
As soon as the words fell, the space above the wasteland instantly distorted, and countless pieces of garbage appeared.
Boom... Boom...
Broken stones, splintered wood, soil... all kinds of miscellaneous garbage poured onto the barren land.
The garbage from the earlier Earth-based worlds had long since been decomposed by the Trash Station itself.
Thus, the garbage appearing before him came from the Tomb Notes World.
Boom...
Another rumble sounded, and garbage from the Battle Through the Heavens World appeared.
There was quite a lot of garbage from the Battle Through the Heavens World, but most of it was soil and broken wood.
Next came the garbage from the Swallowed Star world. Ren was somewhat cautious as this world's garbage poured out.
After all, the setting of Swallowed Star was an apocalypse on Earth, so things like steel still had some use. Even if Ren could not use them, he could forge weapons for the Dog Clan in the future.
The steel bars raining from the sky landed separately to one side, while the remaining garbage all fell onto the wasteland from before.
"Phew..." Ren let out a breath. "Finally, the garbage in the Trash Station has been dealt with. The Trash Station is clean now, too."
He slowly closed the Trash Station, and the distorted space disappeared. Ren looked at the mountain-like pile of garbage before turning to the Ghost-Faced Mastiff King. "You should go back first. I'm going back to sleep too. I'll come see you tomorrow!"
As soon as he finished speaking, Ren turned into a cloud of white mist and vanished. The Ghost-Faced Mastiff King watched him leave, then fixed its lively eyes on the garbage pile before it, a trace of longing appearing within them.
Chapter 33: Bloodline Tremor
The next day, sunlight streamed down.
Ren lay sprawled across his desk, his eyes somewhat weary. "Phew... Kushina Uzumaki, thanks."
Feeling a pair of delicate hands kneading his temples, he became somewhat more awake.
Mikoto Uchiha asked, "Ren... Didn't you sleep well last night?"
"You definitely didn't sleep well. Not only do you look exhausted, you were even sleeping during class just now!" Kushina Uzumaki cut in, looking at Ren.
Ren remained silent. Was he supposed to say that he had spent last night with the Dog Clan?
For some reason, Beast King Mountain seemed to have no night at all. It had always looked like daytime. Thus, Ren had not noticed the passage of time at all. When he returned to his bedroom, he discovered that dawn was nearly here.
After staying up all night, Ren was naturally exhausted.
Ren woke up a little more before asking, "Kushina Uzumaki... Your Uzumaki Clan is skilled in sealing jutsu. Have you ever heard of a sealing jutsu that seals spiritual power within cells, thereby restricting a person's intelligence?"
As he asked, he looked at Kushina Uzumaki.
Hearing this, Kushina Uzumaki said curiously, "Why are you asking about sealing jutsu? Still, the Uzumaki Clan is indeed skilled in sealing jutsu. Even my Chakra contains the energy of sealing jutsu. Especially after Awakening the Sealing Chains, anyone trapped by me is equivalent to being hit by a sealing jutsu. But I've only just started learning sealing jutsu, so I don't know much about most sealing jutsu."
Ren nodded and said, "Oh... So that's how it is? Ask your grandmother when you have the chance. I have a use for this sealing jutsu!"
Kushina Uzumaki nodded and said, "Mm... I'll ask Grandma when I go home today. Grandma knows all the sealing jutsu of the Uzumaki Clan. She definitely knows this one!"
Ren nodded as well, finally putting his mind at ease. Where there was a sealing jutsu, there was a method to undo it. The Dog Clan could be saved, and Ren would not need to waste his Magical Beast meat. Just as Ren was about to catch up on more sleep, Mikoto Uchiha said, "Um... um... I know this sealing jutsu. It seems to be the Spirit-Sealing Technique, a sealing jutsu used against the Summoning Technique."
At this, Ren looked at Mikoto Uchiha in surprise. "Mikoto... How do you know?"
If Kushina Uzumaki had named this sealing jutsu, Ren would not have been surprised at all. After all, the Uzumaki Clan excelled in sealing jutsu, and Kushina Uzumaki was now being taught by Mito Uzumaki. But Mikoto Uchiha was different. She belonged to the Uchiha Clan, so how did she know about a sealing jutsu?
Kushina Uzumaki was also somewhat surprised, but Mikoto Uchiha said, "There's a record of it in the scrolls at home. It seems that an important figure from the Uchiha Clan passed down this sealing jutsu, and my grandfather once kept it. But this sealing jutsu isn't very useful. It's specifically meant to restrain Summoning Beasts, and it only works on newly born Summoning Beasts. The Summoning Beasts that appear on the battlefield are all adults, so this sealing jutsu is too obscure. Grandpa put it away. I found the scroll while sorting through Grandpa's belongings some time ago, but I only read through it a few times and didn't study it closely."
Upon hearing that, joy appeared in Ren's eyes. "Mikoto... I'm looking for this sealing jutsu, so..."
Before he could finish, Mikoto Uchiha said, "I'll bring it to you tomorrow. Mom doesn't care about those things anyway!"
Ren smiled. He knew a little about Mikoto Uchiha's family. Her grandfather had once been a fairly powerful ninja of the Uchiha Clan, but he had died during the First Shinobi World War. Mikoto Uchiha's father had also been a powerful member of the Uchiha Clan, but he had died in battle during the early days of the Second Shinobi World War. Only Mikoto Uchiha and her mother remained, but her grandfather and father had died for the village, bringing honor to the Uchiha Clan. Thus, Mikoto Uchiha lived quite well within the Uchiha Clan.
He had originally wanted to find a method to undo the seal through Kushina Uzumaki, but now he could obtain this sealing jutsu from Mikoto Uchiha. Perhaps Madara Uchiha had unintentionally passed it down.
Ren murmured to himself inwardly. Feeling Kushina Uzumaki's delicate hands, he fell asleep once more.
Not long after, Ren, who had only just fallen asleep, was awakened.
Ren narrowed his eyes. "What's going on?"
The previously noisy classroom instantly fell silent. Then several youths slowly approached and headed directly toward Ren.
Kushina Uzumaki murmured, "They came for Mikoto."
Before you continue