"What happens when you complete all six realms?" Kakashi asked quietly.
"Your body transcends its limits," Fang Xu answered directly.
"Your skin, muscles, bones, organs, blood, and marrow all undergo transformation."
"Your constitution improves dramatically."
"Your maximum Chakra capacity rises with it."
"Most importantly, once your body reaches a higher level of life, your lifespan increases too."
Hatake Sakumo's fingers stopped at the edge of the scroll.
Greater strength was valuable enough.
But the Six Body-Refinement Realms Fang Xu had developed could even extend one's lifespan.
Ninja spent years carrying out missions, and nearly all of them accumulated hidden injuries.
Many were formidable when young, only for their bodies to decline rapidly as they aged.
If this method truly transformed the entire body, it would change more than individual strength.
It could change how the entire Shinobi World trained.
"Fang Xu." Hatake Sakumo's voice turned especially serious.
"This method cannot be passed around carelessly."
"Don't worry."
Fang Xu pointed to the two scrolls.
"Only I and a few people close to me know it so far."
"Once you have your copies, put them straight into your Spatial Bracelets."
"Don't carry them on your person, and whatever you do, don't lose them."
Kakashi reached out and took his scroll.
He handled it gently, afraid of damaging even a single page.
"I'll keep it safe."
"And I won't give it to anyone else without your permission."
Hatake Sakumo put his scroll away as well.
"I understand its value."
"Even if I face certain death, I'll destroy the scroll first rather than let an enemy take it."
Both men placed their scrolls in their Spatial Bracelets.
Only after confirming they were securely stored did Hatake Sakumo stand.
"Come on."
"Let me see how much you've improved this past year."
Kakashi gripped his sword