Robustium Steel

Robustium Steel is a complex metal which has become very rare since most of the world's reserve was used during the Incursion. It possesses many unique characteristics, the most significant being that it cancels out all forms of magic upon touch. Most of what's left of Robustium Steel is at Valhalla or the Four Winds, where the Abyss Watchers use it to fight Hollows.

History
Robustium Steel became very popular during the Warring Clans period in Arestoneiam when rival Shapeshifter Clans discovered that they could render opposing Clans on the battlefield by using the steel to stop them from shapeshifting. It was again heavily used during the Darkest Night when several magical races joined forces to overthrow the many kingdoms in Asaland. The Steel was crafted into arrowheads and were used against the mermaids and sirens that created blockades at sea. The last time it was significantly used was during the Incursion when it was used to create arrowheads and weapons to fight against the shapeshifter hordes. Since, it has been collected by the Abyss Watchers so that they may use it in their fight against the Hollows, however it is still collected by Nobles and Royalty so that they may protect their kingdoms from the same Hollow threat.

Description
In its purist form, Robustium Steel is sleek black and a hard metal which cannot be molded into any shape other than what it is found in. Through consistent use to cancel magic, the metal begins to turn grey as when it cancels magic, it absorbs it and makes it unusable. When Robustium Steel can no longer absorb magic, it turns into a grey stone and breaks apart into ash. Another major property of Robustium Steel is how strong it is. It's considered to be unbreakable because it cannot be molded or forged into another shape under normal circumstances. It takes a magical flame to forge it, as well as a consistent one since the metal would absorb the magical properties. This is why only fire elementals can work the metal.

Uses

 * Blades - Since it's the strongest metal known to Idris, Robustium Steel is used to craft small blades that would easily break under heavy combat. It's popular in Arestoneiam where the blades are thin and made to fight against leather combat attire. With Robustium Steel properties, these blades stand an even chance against larger and heavier weapons as well as small amounts of armor.
 * Arrowheads - The most popular use of Robustium Steel is arrowheads. On the head of an arrow, the metal can be used to take down a Hollow without getting in range of it, saving lives and time.
 * Armor - Robuisum Steel is rarely used to create small pieces of armor, such as chain mail. Because of its durability, the chain mail is stronger than armor and gives warriors more mobility, as well as makes them lighter in combat.