Essence is a Essential Aspect of a character; It is a life-force representation used to make Bonds and Attunements, Pacts, and fuel Augmentations and powers through Mystic Offerings of sacrifice and Ritual. It is reflected in a character’s Aura.
Most living things have a natural Essence Pool based on their Order of Being that binds them firmly to a continuum, while others are more connected to the Aether or even tied to the Void, as in the case of the Body Beyond and/or a Mind Beyond. A setting, locale, and/or race can limit how a character may spend Essence at the time of Character Inception and beyond. Some have specific uses of their initial Essence dictated or adjusted.
Starting: (Order of Being; typically 5) + Weave Factor (factors in Sanity and Charisma)
Adjusting: Permanent Sanity or Charisma changes recalculate the Weave Factor and trigger a moment of Actuated Awareness. It can be sacrificed for many gains, including those of Pacts, signs/portents, as well as deep Bonds and Attunements. Additionally, there are dark arts and strange ways of transferring it between beings. Certain events may trigger a spontaneous change: