Od

A natural energy that permeates through all living things in our realm. With training and meditation one can learn to harness and concentrate their Od to influence the world around them with magical powers, called Manus . One who has control of their manus and can effectively use it in combat is called a Magi
Side Note: Od is required for any natural organisms to live, any consumed Od will naturally be replaced by the body when resting. If all Od is drained from a living creature there is a very high chance it will die or if on the rare occasion before death the Od in the body is fully replaced by Vis the creature may reawaken transformed into a demon.