The Chroma, ruby-red, shedding a clear light from the heart of its essence, it is a mineral of mystical quality. Nobody knows the origin of this powerful material, not even the Lightbringers who were the first to come into contact with it during their cross-dimensional meditations.

Appearing on the Earth and used by men at the time of the Universal Catastrophe, the Chroma, when forged in special furnaces, produces immense quantities of energy that can be applied to anything in industry, agriculture, and other sectors.

Machines, transport, lights, computers, military applications, everything requiring energy now moves and works thanks to the Chroma. Most people don't know the complex and mysterious nature of this incredible source of energy and believe, because this is what their governments tell them, that the Chroma is a normal, although powerful, mineral found on Earth.

Located at a depth of 45 km inside the Earth's crust the Chroma is extremely difficult to extract as a pure mineral. Once extracted though, a single gram of pure Chroma can meet all the electrical energy requirements of a Megacity for 10 years. In the mines, which can generally be found in the centre of each Megacity, 99.9% of impure Chroma is extracted. This consists of common rocks saturated with the energy emitted by the cores of Pure Chroma, which are extremely difficult to find. It has not been proved, but it seems that the pure Chroma self-regenerates. Though how and why is a mystery. The Chroma, according to scientists, has an arcane form of intelligence and will. It lives according to obscure logic.

In order for Chroma to be used for military purposes, such as the manufacturing of bullets, or explosives, the Chroma must be treated using biochemical processes based on the decay of corpses; its vital positive nature has to be contaminated somehow.

This contaminated Chroma, often changes its natural colors and turns black. Due to the small amount of scientific data acquired and likely to be acquired about this mineral, shortages of Chroma often occur inexplicably, leading to indefinite periods of poverty for all the people in the Megacities.

The governments try to get round this by stockpiling Chroma and by constantly seeking for new mines outside the Megacities. Indeed, most of the wars fought amongst the 4 states are aimed at taking over the Chroma mines outside the megacities, in the Dying Deserts.