Cilsius Steel

Cilsius steel (pronounced "Shil-soos") is an alloy containing a fixed ratio of iron and lead, and has the ability to deflect psychic/spiritual attacks. At the same time, it also happens to be a good conduit for Spiritual and Psychic Power, making it a very useful material for the construction of anti-demon weapons and armor. However, because of its construction it is also very heavy. Attempts to make it lighter and harder are usually made using a layering process that creates open areas within the structure.

History

Cilsius Steel (or variants thereof) has existed for thousands of years, often used in the construction of special swords and melee weapons to be wielded by demon-fighting warriors. Sakura Shinguji's Spirit Sword, Arataka was forged using time-honored Shinguji-clan methods using Cilsius steel and Meteoric Ore. The formula and the methods for its production, however, were lost with the rise of the industrial age.

Cilsius Steel was only rediscovered during the American Civil War. Over the course of the war, the Confederacy had begun to gain the upper hand, inflicting heavy losses among Union troops through the use of Voodoo black magic. It was rediscovered by a group of Union troops who had somehow miraculously survived a Confederate magical barrage by taking cover near some old steam tractors, which failed to be destroyed by the assault. The tractors and the materials they were made of were sent to Union leadership, where they used in the construction of special armor barricades, bullets and cannon. The new, highly effective weapons were used to stop and eventually repel the Confederate advance, eventually turning the tide of the war.

Information about Cilsius Steel slowly disseminated throughout the world, but the need for it was not seen until after the devastation of Tokyo, Japan during the Kouma War of 1918. From then, Cilsius Steel was incorporated into the structure of many important buildings, as well as being used in the development of the new, anti-demon Spirit Armor suits.

Use

All Spirit Armor units, such as the Koubu, are constructed from Cilsius Steel, though the machines themselves also include more mundane elements, such as ceramic plating to defend against normal weapons. Some important landmarks are sometimes constructed (or reconstructed) using Cilsius Steel to prevent them from being destroyed by demons.

Variations

U-Steel

U-Steel (short for Ulfberht Steel) is an alloy variation of Cilsius Steel. U-Steel contains about the same capacity of conducting spirit energy through it as regular Cilsius Steel, however, it has the unusual property of being able to be forged in far thicker amounts while remaining a lighter weight without compromising it's structure. However, this is counteracted by how difficult and time consuming it currently is to produce it. The amount of time needed to forge 20 ft of Cilsius steel is the equivalent of 5 ft of U-Steel.