Those who travel with the gods are called 'souls.' Mu Yan, adopted by the Senju Clan, awakened a spirit that should not have existed in the Hokage world.
Wood lives on endlessly. As yang energy first rises, it has yet to become divine, so it first transforms into a soul. When yang energy has fully risen, the soul changes into a 'god,' and thus travels with the gods.
Taking the Tailed Beasts as bones and combining yin and yang release, I call this a 'god.'
Chakra?
"Don't get the wrong idea... It's not something that crude."
The black-haired young man said with a faint smile.
This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.