Mana

The substance known primarily as mana (for lack of a better term) is a form of energy passively generated by all living things, and the energy in which all magic is performed with.

The use of mana
Through the use of mana, magical effects are created which would be impossible without its usage. Mana is manipulated by the brain, with workings of magic being "thought patterns" to create a desired effect.

The body has a limited amount of mana, which will be slowly regenerated. Using up all your mana means you cannot perform magic until your mana returns. The more mana put into a working of magic, the more powerful/potent it becomes.

The power of ones mana is multiplied by things such as words, material components, and magical foci. The formula is as follows: Mana Used x Words x Materials and Foci (the quality of the materials or foci matters) = Power / Potency. Using magic without verbal or material components is extremely costly.

Mana in the body
Mana is generated by all living things, but most present in beings with a developed brain. Do not confuse mana with life-force (bioelectricity), as they are seperate forms of energy.

Mana flows throughout the entire body, and congregates in the Seven Major Chakras and the Five Minor Chakras. The existence of mana in one’s body is also what creates their aura, which is comparable to heat radiating from a fire.

The capacity for mana in one’s body begins small, but increases through practice, study, meditation, and special mantras and incantations. The higher the capacity of the mana in one’s body, the more mana they can expend, meaning they can use magic stronger and more frequently.