Ichor

A fundamental, natural energy source found within the world, existing in four different forms differentiated by color and purpose.
 * Sterling Grade - The purest form of ichor, which occurs naturally in the world, but can also be achieved through fusion. It is used sparingly due to it's rarity and difficulty to produce, and usually saved for medical procedures that test and cure entities of infection.
 * Technical Grade - The second most common grade of ichor, and also one with somewhat flexible usage. Taking on a golden coloration, it's used as a powersource for all technology and machines built by Alpha, including the Modules themselves. It also functions as a light source due to its glow, and for some entities, a food source. It has even been used to temporarily subdue infection symptoms, but can not permanently cure it.
 * Organic Grade - The most common grade of ichor, which flows heavily in rivers and underground lakes in the Eris biome, taking on a rich crimson coloration. It also lies within most living entities as an energy supply for organic beings.
 * Hollow Grade - A blackened form of ichor that occurs after complete decay of ichor properties, which can occur naturally, or when an entity's infection is triggered. It has almost no value, other than as a food source for a few uncommon breeds of entity.