Alchemy: the ancient metaphysical science/mystical art of manipulating and altering matter by using natural energy. This act is known as "Transmutation" and its sequence is usually described as:

Comprehension - Understanding the inherent structure and properties of the atomic or molecular makeup of a particular material to be transmuted, including the flow and balance of potential and kinetic energy within.
Deconstruction - Using energy to break down the physical structure of the identified material into a more malleable state so as to be easily reshaped into a new form.
Reconstruction - Continuing the flow of energy so as to reform the material into a new shape.
The proper application of this craft requires not only a full understanding of chemistry and ancient alchemical theory, but also a sort of natural talent towards recognizing and manipulating the physical objects with energy, which require uncommon levels of intelligence and aptitude. Those remarkable individuals capable of studying and practicing alchemy are known as "Alchemists".

There are many paths by which alchemists can transmute the various substances of the world, with some alchemists being said to transmute by way of the Four Classical Elements (Water, Earth, Fire and Air) and some by way of the Three Essential Principles (salt, sulfur and mercury), but the basic tenet at the very foundation of all alchemy is that of Equivalent Exchange.

Equivalent Exchange:

The mystical practice of alchemy to create objects out of raw matter or turn one object into another is widely believed to be capable of anything - indeed alchemy is often viewed as magical or miraculous by those unfamiliar with the craft - but it is a science and as such is subject to certain laws and limitations, all of which fall under the concept of Equivalent Exchange: "In order to obtain or create something, something of equal value must be lost or destroyed."
In standard practice, Equivalent Exchange is separated into two parts:

The Law of Conservation of Mass-

which states that energy and matter can neither be created from nothing nor destroyed to the point of elemental nonexistence. In other words, to create an object weighing one kilogram, at least one kilogram of material is necessary and destroying an object weighing one kilogram would reduce it to a set of parts, the sum of which would weigh one kilogram.

The Law of Natural Providence-

which states that an object or material made of a particular substance or element can only be transmuted into another object with the same basic makeup and properties of that initial material. In other words, an object or material made mostly of water can only be transmuted into another object with the attributes of water.

Rebound

Since the alchemical forces being manipulated are not human in origin, but of the world as a whole, the consequences for attempting to bypass the Law of Equivalent Exchange in transmutation are not merely failure and cessation. When too much is attempted out of too little, what occurs is called a Rebound, in which the alchemical forces that are thrown out of balance on either side of the equation fluctuate wildly of their own accord in order to stabilize themselves - taking or giving more than was intended in often unpredictable and catastrophic ways such as accidental mutation, serious injury or death.

Transmutation Circle

In order to begin an alchemical transmutation, a symbol called a Transmutation Circle is necessary. A Transmutation Circle can either be drawn on the spot when a transmutation is necessary (in chalk, pencil, ink, paint, blood or even traced in dirt) or permanently etched or inscribed beforehand, but without it, transmutation is generally impossible.

Human Transmutation

Unfortunately, these experiments have given birth to a dark and sinister side of alchemy. Whether out of despair, malice or inquisitive hubris, several alchemists have been known to attempt the application of transmutation to human bodies and souls, in essence, playing god with human lives. But, just as the Law of Equivalent Exchange applies to the transmutation of non-living matter, devastating rebounds can occur in Human Transmutation because human lives and souls are priceless according to the flow of the world.

Races

Human- the dominant beings on the planet Earth and comprise most of its animal population. In addition to being the only life forms capable of using tools and skills in an advanced manner, they are also the only known species on Earth capable of performing alchemy.

Ishvalan- Refers to the indigenous people of the nation called Ishval, which would come to be a region in the southeastern area of greater Amestris. The Ishvalans are an ethno-religious group identified by their ethnicity but unified by common religious beliefs. Although they are usually characterized by brown skin and white or silver hair, Ishvalan people are most definitively distinguished by their red eyes, which persist as a dominant genetic trait regardless of whether or not Ishvalans marry outside of their ethnicity. They are the only race capable of wielding the Transmutation Array.

- A Transmutation Array is similar to a transmutation circle in that it is used to circulate the energy used in a transmutation. However, unlike a transmutation circle, the runes are not confined to the circumference of the circle and may use the circle only as a small aspect of their function. In some instances, a transmutation array may not even be a circle at all, using different concepts to bring about the circulation or release of the energies involved. Transmutation arrays are often found as full body tattoos on alchemists due to the shape of the human body. It is also possible that the non-cyclical nature of transmutation arrays amplifies the 'destruction' stage of alchemy




[Character Sheet]

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