However, the conditions for learning this medical ninjutsu are also stringent. It requires a deep ability to utilize Immortal Techniques and must be a Medical Ninja proficient in various Medical Ninjutsu to increase the success rate.
"It's truly a remarkable medical ninjutsu."
Hakushi praised.
Slugtong humbly replied, "Lord Hakushi is truly the remarkable one, perfecting a Sage Art System suitable for himself without predecessor guidance."
"That was just a coincidence. Thinking back, many of my initial experiments were actually lucky accidents. Such as using Chakra to verify the existence of Natural Energy, based on the premise that Chakra can indeed merge with Natural Energy to form Sage Art Chakra."
Hakushi said.
"Is that so, although it was a lucky accident, Lord Hakushi's verification process wasn't entirely wrong. Chakra and Natural Energy do have a close connection."
Slugtong responded.
"Oh?"
Hakushi looked at Slugtong in surprise, then found ease.
Slugtong, being a creature that has lived for over a thousand years, naturally has a deeper understanding of Natural Energy and Chakra than himself.
"In an era more than a thousand years ago, this world originally did not have the substance known as Chakra."
"No Chakra?"
Hakushi frowned.
"At that time, the natural world only contained Natural Energy. Due to celestial mutations, Chakra was born."
"Celestial mutations? What are those?"
Hakushi inquired.
"The existence known as Divine Tree. The Divine Tree absorbed the Natural Energy from the natural world and bore a fruit at the top of its branches. That was the beginning of Chakra and its origin."
Slugtong narrated the past events.
"So, is Chakra converted from Natural Energy? Is the most primitive essence of Chakra Natural Energy?"
Hakushi was astonished.
He had never thought from this perspective.
Unaware that the essence of Chakra is actually Natural Energy.
"You could say that. Natural Energy is wild and untamable. The Divine Tree couldn't directly consume such wild power, so for its own safety, it transformed into the more controllable Chakra. Subsequently, the substance known as Chakra began to prevail in the world, gradually replacing Natural Energy's status and infiltrating every living creature's body, passing down through generations."
"And what about the Divine Tree?"
Hakushi asked with interest.
Although he briefly learned about the origin of Chakra and its relationship with Natural Energy, Slugtong did not explain the fate of the Divine Tree.
"Lord Hakushi should have heard of it."
Slugtong's words puzzled Hakushi.
"I've heard of it?"
"Tailed Beasts. The Divine Tree is a giant demon that later split into nine Tailed Beasts, passed down from ancient times until now. That demon is also known as the Ten-tailed, the collective entity of all Tailed Beasts."
Slugtong stated the secret that could overturn oceans in Hakushi's mind in a calm tone.
"Tailed Beasts... Natural Energy... Chakra... Ten-tailed Divine Tree..."
Hakushi recalled the experiments he had conducted and his partial research on Tailed Beast Chakra.
Even a mass of Chakra possesses an incredibly strong independent consciousness.
"It's truly an interesting history."
Hakushi's face lit up with a smile.
He found signing a contract with Slugtong to be a truly delightful feat.
Not only did he learn powerful Immortal Techniques, but everything it experienced is truly what people of this era need.
"Slugtong, may I ask a favor of you?"
"What is it?"
"Send out a clone to me and write the true history there, revealing the ultimate truth of all things to the world. It's the ultimate question they must know and consider. Your millennia of experience and knowledge are the real treasure, far surpassing the superficialness of Immortal Techniques."
Hakushi stepped forward, gazing at the boundless heavens, a look of excitement in his eyes.
Slugtong had never seen Hakushi like this before.
Lord Hakushi... truly a strange human. It thought to itself.
Even Tsunade, who could befriend it, only learned Ninja Techniques from it, having no interest in its experiences and knowledge of history.
Those who came to Shikkotsu Forest in the past also showed no interest in past events, as if Ninja Techniques and power were the primary pursuits.
But because of this, it could sense Hakushi's uniqueness.
His thoughts clashed with the Ninja of this world, full of vitality and hope.
Recalling Hakushi's words again, to bring a different wind to this world, sweeping across the earth, sky, and ocean.
"Yes, alright, Lord Hakushi."
Slugtong's tone was filled with sincere joy.
It was an emotion it hadn't felt for a long time.
Following such a Contractor is bound to witness more beautiful scenery.
And see the birth of a whole new world.