Most everything is comprised of one or more energies. One energy is usually in concentration, like the life energy of living creatures, the negative energy of the undead, or the fire energy of certain fiery brutes. Spells are composed of various types of energy like the arcane energy of a mage's Fireball which has an energy composition of arcane, fire, and air; the latter to give the spell flight. Areas, worlds, and even entire systems can be a concentration for certain energy types. These places are Focuses for certain Energy Types, places where they are more potent and dangerous.
In the Dawn Era, a Lith-Crillion named Githyon served as an advisor to Ptah. Like his master, Githyon was deep into the study of psychic energy. His experiments led to the psionic methods known today as Energy Exchange. In a secret lab on Ghífthauk, using earth archons as subjects, Githyon created the first Githzerai and then the Githyanki by exchanging an archon's elemental energy with life energy, and trapping forlorn souls destined for Chaos. Similar methods were used in the Second Epoch by githzerai scientists of the Zisi-Nul, leading to the creation of the Githirmil.
In the First Epoch, the Khazarkar Empire selectively bred enslaved minotaurs. The Khazarkar's Department of Retooling, by way of the Minotaur Cultural Edict, did this by managing who was allowed to mate. They made sure only those with low entropic energies copulated. Three centuries of this led to most minotaurs having more negative entropy than its antithesis. This change was only temporary. During the time when Coeus was their patron deity (815 - 1695), Ba'lith's minotaurs became just as chaotic as the day they were crafted by Baphomet.
When a living creatures becomes an undead, they give up life energy for negative energy. It is considered the easiest way to swap one energy for another. Outside of a powerful psion, or group of them, performing an Energy Exchange, the normal way energy is exchanged for another is time; the more time a wizard spends in the arts, the more arcane energy they accumulate at the expense of something else.
It is thought that some worlds have a energy composition particularly suited for certain lifeforms, like the legendary beasts all said to have been born on one of Aborea's beast worlds.
|living creature||life energy||>= 51%|
|undead creature||negative energy||>= 51%|
|created in Chaos||entropic energy||>= 25%|
|created on Mechanus||negative entropy||>= 25%|