Suddenly, when the chakra level had dropped dangerously low, threatening his life, Hyuga Shingo's body broke through the limits imposed by the special anesthetics, emitting a horrifyingly miserable scream.
At a visible speed, the Curse Seal on his head emitted a green glow, generating a form of chakra that Hakushi had never seen before.
Once this chakra was produced, it began flowing directly into Hyuga Shingo's brain within Hakushi's perception, possessing an extremely destructive power.
Completely different from the chakra flow activated by Ruri's Sharingan.
Hakushi interrupted the absorption of chakra from Hyuga Shingo's body, causing the chakra in the glass bottle to begin to flow back. Only then did the Caged Bird Cursed Seal on Hyuga Shingo's forehead regain its calm, as the chakra retracted back into the seal.
Hakushi picked up the glass bottle used to absorb chakra, now visibly cracked and shattering in his hand, shards of glass falling to the ground.
"As expected, it's like this."
Watching Hyuga Shingo pass out in extreme pain, Hakushi breathed a sigh of relief.
The progression of events did not exceed his expectations.
The so-called 'jutsu', no matter how it evolves, is essentially an application of chakra.
Take the illusion technique of the Sharingan as an example, to fulfill the condition of 'eye contact', invading the target's brain nerves with one's own chakra, and manipulating the designated target's brain nerves.
In this process, chakra forms the concept of 'jutsu', allowing control over the enemy's brain nerves.
A powerful Genjutsu Ninja can even hypnotize the target's brain nerves at will, achieving their desired outcomes.
It's not only the Sharingan; other illusion techniques operate similarly.
Whether triggered through vision, smell, or touch, or other types of Five Senses Genjutsu, flowing one's chakra within the enemy's brain nerves is needed for hypnotic control.
Depending on the caster's chakra control skills and how the 'jutsu' is constructed within the target's brain nerves, the types of illusions vary greatly.
Among them, one point must be noted.
No matter the type of illusion, they have a time limit.
The chakra sent out is not endless; even if exerted to the utmost to maintain it, eventually the chakra sent out will dissipate.
This means, as time continues to extend, the ninja casting the illusion will eventually have their technique broken due to insufficient chakra.
Chakra cannot maintain the concept of the illusion.
Ninja Techniques and Juinjutsu also follow this model.
Time sensitivity is very important.
The flames produced by Fire Style last a short time, unless there's something combustible to maintain them after release.
Because these flames aren't real flames, they are essentially a mass of chakra, simply forming the concept of 'jutsu'.
The maintenance of Juinjutsu cannot be perpetual and undoubtedly has a 'time sensitivity' mechanism.
But how to make the Caged Bird Cursed Seal fulfill the condition of time sensitivity was observed just now, revealing a noticeable flaw.
Using the perception generated by Spirit Transformation Jutsu, Hakushi discovered that during the activation of the Caged Bird Cursed Seal, a special chakra remained within Hyuga Shingo's brain nerves.
This chakra did not stay long within Hyuga Shingo's brain nerves and has almost dissipated on its own now.
Hakushi smiled slightly.
While the experiment was somewhat dangerous, the result seemed not too bad.
At the moment of Juinjutsu activation, within the system formed by Juinjutsu, tangible chakra is produced.
That portion of chakra was not retracted by the Caged Bird Cursed Seal; it was consumed completely.
If this process is repeated back and forth, the Caged Bird Cursed Seal will eventually lose the chakra needed to maintain the 'jutsu' concept and will decompose from within.
"The Caged Bird Cursed Seal wasn't fully triggered; it seems like the way to trigger the seal through disappearing chakra is one form of triggering the Caged Bird Cursed Seal."
Thinking this way, it becomes much more manageable.
Conditions and hypotheses are set.
He now has a complete method of replacing chakra with life energy, which can ensure survival after abandoning chakra.
Hakushi placed his palm on Hyuga Shingo's forehead to investigate the condition of his brain.
This aspect was particularly challenging, yet the most crucial part of the experiment process.
Previously, chakra extraction was interrupted in time, preventing the Caged Bird Cursed Seal from fully exploding; however, that special chakra went straight for Hyuga Shingo's brain nerves, causing destruction.
This is where the trouble lies.
If repeating the experiment through constant chakra depletion to deconstruct the Caged Bird Cursed Seal isn't difficult, the focus now shifts to ensuring the experimental subject's brain nerves remain safe when the seal triggers.
Hakushi pondered, then squatted down, picking up glass shards from the ground.
The tool used to absorb chakra shattered, and on the glass shards, alongside the chakra aura of Hyuga Shingo, there's a residual aura of another chakra.
It's the collision of two different chakras that caused the glass bottle to shatter.
"A part of it was attracted, but the absorption force doesn't seem strong enough... It seems choosing a tool with stronger absorption is necessary."
Hakushi walked over to a nearby shelf, picked up two chakra bottles, and then grabbed a syringe from the medicine tray, starting to inject medication into Hyuga Shingo's body.