I really don't want to answer the question of Chakra, but some people still bring it up, so there's nothing I can do about it. The answer has actually been given in the manga.

Kakashi and Payne fought and died because they ran out of chakra.

The origin of chakra, Madara said personally, the origin of chakra is the sacred tree, which was brought to the earth by Otsuki Kaguya from other places, not the original thing of the earth.

It is also stated in the official setting that Otsutsuki Kaguya is the first person on earth to have it. Remember, he is the first person to have Chakra, and he eats it from the fruit of the sacred tree.

In other words, before Otsuki Kaguya, there was no such thing as Chakra on Earth. It also proves that ancient humans would not die without Chakra.

But when it comes to the original period, Kakashi will die because of running out of chakra, emmmmm...

The reason why chakra became the necessary energy for life on earth to maintain life is likely due to some unknown changes.

For these unknown changes, AB did not give an explanation or any instructions, and can only rely on various personal guesses.

My personal tendency is that the earth experienced some kind of big change many years ago because of the planting of the sacred tree.

I don't know if there is a new explanation of Chakra in the blogger's biography, because I only watched a few episodes of the blogger's biography, and I haven't studied it deeply. I don't want to touch Otsutsuki's alien setting, because the water inside is too deep for fear of drowning.

As for the darkness of sprites collecting people's hearts, it is more reasonable to use chakra here.

Chakra has the function of "transmitting information". The Sage of the Six Paths also said that he first spread Ninja Buddhism in the hope that human beings can communicate with each other under the guidance of Chakra, and build a bridge for everyone to understand each other.

It can be seen that Chakra has a special channel for communication between the soul and the soul.

To absorb the darkness of people's hearts, sprites must rely on "channels" to contact the hearts of human beings, otherwise it is impossible to explain that sprites absorb the darkness of people's hearts, and sprites are truly invincible.

So it is set here to absorb the dark part of people's hearts through the channel of Chakra.

Once the connection between itself and Chakra is cut off, the monster will lose the "bridge" to the depths of the human heart, and the darkness it controls will be useless.

For others, losing chakra is death, but for Shiraishi, it is just relying on another energy to maintain life. Here is a ghostly hand.

The basic structure is given by the official, and I only made supplementary explanations in this book, and the ghost part of the second creation may be a little unreasonable. However, the origin of Chakra comes from the sacred tree and ancient humans do not have such content as Chakra, which are all original things in official comics and settings. If you veto these, it can only show that the settings before and after Naruto have once again caused conflicts...why say it again...

I understand everything.

Anyway, I don't believe that the third Hokage is the strongest Hokage.

Let Kakuzu go to assassinate the first generation of Hokage, and the brains of the senior officials of Takiyin Village must be kicked as a ball.