Jin shifted his gaze away from the Forbidden Scroll and raised his head.
He rubbed his neck, which felt a little sore.
Whenever he thought about how to improve Basic Inner Cultivation, his head began to throb.
Basic Inner Cultivation essentially existed to serve Chakra, and its entry threshold was not high.
But improving Basic Inner Cultivation raised that threshold to an absurd degree.
The sealing difficulty did not change much; it simply demanded greater ninja talent.
Two conditions were required: attribute transformation and nature transformation.
Attribute transformation was not difficult. Most ninjutsu involved transforming Chakra attributes.
But nature transformation was a talent possessed by only a small number of ninjas.
Jin felt fortunate that he possessed that talent.
Until he figured out why, he could only classify it as an innate gift.
The Breathing Technique and Steel Cutting Flash were ninjutsu Jin had created that related to nature transformation.
Spirit Gun, meanwhile, was purely attribute transformation.
Six Paths Immortal Thief was research into Chakra.
Returning to the development of inner cultivation.
The direction for improving Basic Inner Cultivation was mainly to create a state within the body that was half attribute and half Chakra.
If it were converted into a pure attribute, it would instead harm the ninja himself.
Only a half-Chakra state could be safely preserved within the seal.
And if he wanted to improve it.
He first needed to determine the attribute Chakra would transform into.
That was also why Jin had delayed choosing a direction for development.
Once Chakra inner cultivation settled on an attribute, it would become stronger in that attribute. At the same time, being restricted by that attribute would proportionally weaken the power of ninjutsu from other elements.
That would also make a ninja's strength overly one-dimensional.
Aside from the few ninjutsu unrelated