Here’s a bit of setting material that I threw together back in the day while mulling over Compass of Celestial Directions: Autochthonia. It’s the sort of thing that blog-based design enables; overly narrow setting details of this sort aren’t really worth the wordcount in a published supplement, but if it’s available for free online, why not?
Alloys of the Magical Materials
The magical materials are not always used in pure form. Dynasts are intimately familiar with jade-steel alloys, but that’s just the tip of the iceberg. Countless alloys of the magical materials have been designed by Essence users to fulfill specific purposes. In the current era, the Sodalities of Autochthonia are likely the most knowledgeable about such things, as their records stretch back over five millennia of research, including both their own inventions and those alloys discovered in their explorations of the world-body of the Machine God.
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We’re not going to present elaborate lists of trait bonuses associated with each and every potential alloy. Instead, these alloys provide examples and guidelines for when you want to create a unique item whose attributes don’t match those provided by any of the Six Magical Materials.
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Atrast is a light, hard metal composed of three parts starmetal to two parts soulsteel, supplemented with various trace metals and metalloids. Its matte-black surface is spattered with pale, colorless gleams. Attuned to axiomatic forces, it is antithetical to variance, such that any given atrast fiber in a magitech device can only convey impulses of a single intensity. Atrast is used as a medium for artifacts intended to impose objectivity. While this includes devices for truth-telling and for suppressing emotion, it also includes all manner of lethal weaponry, as atrast is a fine tool for replacing the murky probabilities of life with the certainty of the grave.
Electrum Major is made from equal parts orichalcum and moonsilver, along with trace quantities of gold, silver and mercury. Though strong by most standards, it is softer than either of the magical materials used in its manufacture. Electrum major effectively channels various flavors of Essence, and is used to harmonize flows of Essence that would otherwise be incompatible.
Gradient alloys are a category of alloy defined by structure rather than substance. An object made from a gradient alloy shifts smoothly from one metal at one end of the object to another metal at the other end. For instance, a rod of copper-tin gradient alloy is composed of pure copper at one end, shading steadily through proportions of bronze in the middle toward pure tin at the other end. Gradient alloys are common in the theotechnological organ-structures native to the body of the Machine God and are sometimes utilized in magitech infrastructure and Alchemical Charms.
Jade admixtures are most often cosmetic in nature, wherein substances with compatible magical qualities or which are magically null are added in order to change the jade’s appearance. Common admixtures of this sort include colored jades that have been lightened or darkened through the addition of powdered black or white marble, translucent jades that incorporate sizable amounts of glass or crystal, or the addition of metal filings to make the jade sparkle.
Alternatively, one color of jade can be mixed with another to blend their magical qualities. Such admixtures include the off-white hue of “ash jade”, which includes a small amount of black jade for resilience, and the many peculiar properties of blue-green jade alloys. The admixture of red and blue jade to create purple jade falls within both categories; its fusion of unpredictability and speed makes it useful for both arms and armor, while its unique hue makes it popular among the Chosen of Endings.
Majestrum is a hard, dense metal composed of six parts orichalcum, four parts soulsteel, one part moonsilver and one part starmetal. Although it appears a lustrous black in indirect lighting, when illuminated directly it throws off a golden sheen. Majestrum both resists and distorts the flow of Essence, making it useful in magitech circuitry. In addition, when forcibly infused with Essence, it harmonizes beautifully with magics of dominance and control.
Virinc is a composite material composed of four parts adamant and one part starmetal. Though transparent, it shines with brilliant varicolored patterns in even the dimmest light. The inner angles of its crystalline structure flex in accordance with the flavor and intensity of whatever Essence is channeled through it, altering its configuration in predictable, replicable ways. This makes it ideal for use in artifacts designed to reflect, refract, reify, focus or disperse energies or imagery.