Pure Essence

Pure Essence (真氣, Shinki; literally "True Energy") is the energy possessed by deities, such as the Shinju, which exists as a source of energy and therefore the most purest of sources. Natural energy is a product of the Shinju's pure essence, as the latter is a deity of the earth itself and therefore the one that gave birth to life on the planet. This energy can only be acquired by others through a method of permanent and lasting absorption directly from the source; an example being when Kaguya Ōtsutsuki consumed the Chakra Fruit and acquired the Shinju's pure essence, which resulted to her godlike power to command nature itself as well as her vast reserves of energy.

When this form of energy is passed on to others, it becomes tainted by the corruption of morality and weakens in its potency. When chakra was passed down through the teachings of Ninshū, it was due to the human condition that the Shinju's pure essence had become the existing form of chakra; being a mere empty shell of its original potency.