The audience raised their eyebrows when they heard this.
They did notice this. Except for Jiraiya and his apprentice, all the people invited to participate were ninjas with families behind them. As for Orochimaru, he was standing here as a developer.
"Is this technique suitable for the ninja clans?"
"But the power of each inheritance is completely different!"
"Could it be a technique that requires the joint efforts of multiple people?"
"That's not right. I heard that a large amount of chakra metal was exchanged before."
"Ninja tool-related techniques?"
The clan leaders became curious. This matter concerned the families. They all became serious.
"Without further ado, I'll get straight to the point," Nara Shintaku smiled and said. "You should have heard that I exchanged a large amount of chakra metal with Orochimaru."
"Many people thought that we were going to forge ninja tools."
"No, we are developing ninjutsu."
"Of course, it is actually a special ninja tool," Nara Shintaku said, stretching out his palm. There was nothing in his hand. "Please look at this," he said softly.
Everyone's eyes fell on his palm.
Swoosh!
Suddenly, a shadow appeared in his empty hand. It looked like a kunai.
"What is that?"
"It seems to have appeared suddenly..."
"I sense the presence of Yin Release chakra."
"Is that a kunai made of chakra metal?"
Everyone was wondering.
Swoosh! The kunai in Nara Shintaku's hand quickly transformed from a phantom into a solid object.
"What?!"
Everyone was shocked. The Uchiha and Hyuga people couldn't help but activate their dojutsu.
"How did that kunai appear?"
"Space-time ninjutsu?"
"No, it has nothing to do with time and space..."
"That was something that transformed from a shadow into a solid object out of thin air!"
Then, Nara Shintaku let go of the kunai, and it dropped to the ground.
Bang!
It looked like an ordinary kunai, but it smashed through the ground like a boulder, creating a ten-meter-wide pit on the ground.
"How can this be?"
"This weight is totally unreasonable!"
"Is it Earth Release gravity ninjutsu?"
"No, there's no Earth Release chakra involved."
"It seems to be the characteristic of the kunai itself!"
Everyone was stunned. They looked at the massive hole in the ground and then at Orochimaru, their faces full of disbelief.
"Hehe, this is just an unfinished product made from the chakra metal my teacher provided," Orochimaru smiled mysteriously, letting the onlookers marvel without explaining anything further.
"So amazing!"
In the crowd, Yuhi Kurenai's mouth hung open in shock, completely losing her composure. She couldn't understand the technique at all, but even without understanding it, she could still feel how terrifying the kunai was.
"Is it a weapon that can be summoned at any time?" Jiraiya muttered to himself, his expression serious.
"Not only that, the weight of the kunai is inexplicable," The Third Hokage pondered, having an inkling about something, but unable to grasp the full picture.
"Is this what you and Orochimaru have developed from the spiritualization technique?" Tsunade asked in surprise, casting a deep look at Nara Shintaku.
In the field, Nara Shintaku waved his hand casually, and the kunai on the ground disappeared. Then, with a simple flick of his hand, the kunai reappeared in his palm. He threw it again, casually this time.
Whoosh!!
The kunai shot out like a cannonball, slicing through the air with a heavy whoosh. In the blink of an eye, it struck a wall dozens of meters away.
Boom!!
The massive wall was shattered. The front part of the wall was turned to rubble, which fell to the ground in pieces.
"..."
Everyone fell into stunned silence.
This level of power could already break through a mountain! None of the ninjas present, even with their most powerful Earth Release techniques, could defend against such an attack.
The walls of the Anbu base were specially reinforced, not just with earth and rocks, but also with buried iron. Yet, they were still reduced to rubble by Nara Shintaku, demonstrating the terrifying might of the attack.
"You must be curious about this kunai," Nara Shintaku said as he waved his hand again. The kunai, which had pierced through the wall, flew back to his hand effortlessly, regardless of the distance.
The kunai should have been impossibly heavy, but in Nara Shintaku's hand, it seemed like a normal kunai, light and easy to handle.
"Now, I will reveal its secret."
At this, everyone perked up and paid close attention to Nara Shintaku, as if they were students in a ninja academy class.
"You all know of the Spiritualization Technique, which can activate and materialize the intangible soul," Nara Shintaku said with a smile, beginning his explanation.
"This gave me an idea."
"Why not use it in reverse?"
"For example, turning a solid object into a phantom."
Boom!
It was as if lightning had struck everyone's minds.
"Reverse application?"
"Oh my god, is that even possible?"
"My guess was right! That kunai transformed from something intangible to something solid!"
"No wonder it can be recalled regardless of distance!"
Everyone was in shock. They stared at Nara Shintaku in disbelief.
"Reverse application?" Jiraiya was stunned, muttering to himself, "Really, Shintaku... Only you and Orochimaru could think of using it like this, right?"
"Teacher, most people find it hard enough to even learn the Spiritualization Technique," Namikaze Minato said with a wry smile.
"No wonder... This kid once told me his understanding of the Spiritualization Technique surpassed that of the Second Hokage. So it's true," The Third Hokage said to himself, surprised.
In the crowd, Yuhi Kurenai widened her eyes in disbelief.
"Using the Spiritualization Technique in reverse to make physical things intangible?"
"Is that even possible?"
"Can humans really do that?"
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Spoiler
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Don't worry, the clans doesn't have that much talent to learn that. From what I've read in the recent chapters no one have done it yet except for the creators. Also, the war chapters is coming close so look forward to it.