As for cultivating Natural Chakra, that was even more impossible. After all, cultivating Chakra naturally required strong mental control.
Madara Uchiha's use of this Sealing Jutsu was simply the nemesis of Summoning Beasts. It was especially devastating against Summoning Beasts that had yet to mature; once sealed, they found it difficult to recover. Moreover, this seal could be passed down through bloodlines. It was practically a Sealing Jutsu capable of destroying an entire summoning species.
Ren narrowed his eyes. "How did the Uzumaki Clan come up with this kind of Sealing Jutsu? I didn't see it in the scrolls written by Madara Uchiha!"
Ren pondered for a moment. 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 ask 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 seal would be easy.
Compared to that, the records mentioned several ways to remove the seal. After studying it, the Dog Sage concluded that breaking the seal only required disrupting its balance. If the flesh and blood cells of the Dog Clan became powerful enough, they might be able to 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, he could only strengthen the Dog Clan once. Any further enhancement would cause the Dog Clan to suffer Natural Chakra erosion and become completely beastified.
Seeing this, Ren said, "So that was it... The enhancement last night was actually Natural Chakra. No wonder it hurt so much, yet had such great results. It was an enhancement technique created by the Dog Sage. Unfortunately, excessively using this method to strengthen the body will turn one beastified."
Ren shook his head and set down the records, 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, toads were pitifully weak. The same went for snakes. Such innate racial differences were not easily resolved.
Ren patted the Ghost-Faced Mastiff King's head. "Don't worry... You will soon regain your intelligence, and then you can keep growing stronger. Tomorrow, I'll ask Kushina Uzumaki about it. Hopefully, I can obtain a way to remove the Sealing Jutsu. Even if I can't find a way to lift the seal, 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. With stronger physiques, their cells could be enhanced, and 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 World trash. That substance could also strengthen the body. Unfortunately, Ren had no idea about the Foundation-Building Spirit Liquid's effects. Afraid that its violent energy might damage the body, he had never dared to use it. He did not even dare test it, since there was so little of it, and he did not understand Medical Ninjutsu. He did not even know how to conduct an experiment.
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 Beast King Mountain's useless land?"
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 land.
Ren stared ahead and said, "This will do! Dump out all the useless trash from the Trash Station!"
As soon as he spoke, the Kong above the barren land instantly twisted, and countless pieces of trash appeared.
Boom! Boom!
Broken stones, splintered wood, soil... all sorts of miscellaneous trash poured onto the barren land.
The trash from the previous Earth-based worlds had long since been broken down by the Trash Station itself.
Thus, the trash that appeared before him was from Tomb Notes World.
Boom!
Another rumble sounded, and trash from the Battle Through the Heavens World appeared.
There was quite a lot of trash from the Battle Through the Heavens World, but most of it was soil and broken wood.
Next came the trash from Swallowed Star. Ren was somewhat cautious as the trash from that world poured out.
After all, Swallowed Star took place in an apocalyptic Earth setting, 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.
Steel bars rained down separately to one side, while all the other trash fell onto the barren land from before.
"Whew..." Ren let out a breath and said, "At last, all the trash in the Trash Station has been dealt with. The Trash Station is clean now too."
He slowly closed the Trash Station, and the twisted Kong-space vanished as well. Ren looked at the mountain-like pile of trash before turning to the Ghost-Faced Mastiff King. "Go back first. I need to return and sleep too. I'll come see you tomorrow!"
With that, Ren turned into a puff of white smoke and vanished. The Ghost-Faced Mastiff King watched him leave, then turned its gaze toward the pile of trash before it, a trace of longing appearing in its lively eyes!
Chapter 33: Bloodline Tremor
The next day, sunlight spilled down.
Ren lay on his desk, his eyes somewhat weary. "Whew... Kushina Uzumaki, thanks!"
As he felt a pair of soft hands kneading his temples, he became somewhat more alert.
Mikoto Uchiha said, "Ren... Didn't you sleep well last night?"
"You definitely didn't sleep well. Not only do you look exhausted, you even slept during class just now!" Kushina Uzumaki added, 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. It had always looked like daytime. As a result, Ren had not noticed the passage of time at all. By the time he returned to his room, he discovered that dawn was nearly here.
Having not slept all night, Ren was naturally exhausted.
Ren became a little more awake, then asked, "Kushina Uzumaki... Your Uzumaki Clan is skilled in Sealing Jutsu. Have you ever heard of a Sealing Jutsu that can seal mental energy inside cells, thereby limiting a person's intelligence?"
As he asked, he looked at Kushina Uzumaki.
Kushina Uzumaki spoke curiously, "Why are you asking about Sealing Jutsu? Still, the Uzumaki Clan is indeed proficient in Sealing Jutsu. Even my Chakra contains the power of Sealing Jutsu. Especially after awakening the Sealing Chains, anyone trapped by me is basically under a Sealing Jutsu. But I've only just begun learning Sealing Jutsu, so I don't know much about most of them."
Ren nodded and said, "Oh... So that's how it is? Ask your grandmother when you have time. I have a use for this Sealing Jutsu!"
Kushina Uzumaki nodded and said, "Mm... I'll ask Grandma when I go back today. Grandma knows all the Uzumaki Clan's Sealing Jutsu. She'll definitely know this one!"
Ren nodded as well, finally at ease. If there was a Sealing Jutsu, there had to be a way to remove it. The Dog Clan could be saved, and Ren would not need to waste his Magical Beast meat. Just as he was preparing to catch up on sleep, Mikoto Uchiha said, "Um... um... I know this Sealing Jutsu. It seems to be called the Spirit-Sealing Technique, a Sealing Jutsu used against Summoning Techniques."
At that, Ren looked at Mikoto Uchiha in surprise. "Mikoto... How do you know?"
If Kushina Uzumaki had mentioned this Sealing Jutsu, Ren would not have been surprised at all. After all, the Uzumaki Clan excelled at Sealing Jutsu, and Kushina Uzumaki was currently being taught by Mito Uzumaki. Mikoto Uchiha was different. She was from the Uchiha Clan, so how could she know about Sealing Jutsu?
Kushina Uzumaki was also somewhat surprised, but Mikoto Uchiha said, "There was a record of it in my family's scrolls. It seems this Sealing Jutsu was passed down by an important figure of the Uchiha Clan and was once collected by my grandfather. But this Sealing Jutsu was not very useful. It specifically restricted Summoning Beasts, and only Summoning Beasts that had just been born. The Summoning Beasts that appeared on the battlefield were all adults, so this Sealing Jutsu was too obscure. Grandfather put it away. I only found the scroll while sorting through Grandfather's belongings some time ago. I only read it a few times and didn't study it closely."
Hearing that, joy appeared in Ren's eyes. "Mikoto... I've been 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 chuckled. 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's father had also been a powerful member of the Uchiha Clan, but he had died in battle during the early stages of the Second Shinobi World War. Only Mikoto and her mother remained, but both her grandfather and father had died for the village, bringing honor to the Uchiha Clan. Thus, Mikoto lived fairly well within the Uchiha Clan.
Originally, he had wanted to find a way to remove the seal through Kushina Uzumaki, but now he could obtain the Sealing Jutsu from Mikoto. Perhaps Madara Uchiha had passed it down unintentionally.
Ren muttered to himself inwardly, felt Kushina Uzumaki's soft hands, and once again drifted into sleep.
Not long after he fell asleep, Ren was awakened.
Ren narrowed his eyes and asked, "What's going on?"
The previously noisy classroom instantly fell silent. Then several youths slowly approached and headed straight toward Ren.
Kushina Uzumaki murmured, "They're here for Mikoto!"