Aura Steel

Description
Aura Steel is an alloy made from metal and Soulblood. The making process is passed down the Asakura bloodline and guarded with their lives. The clan died out few years before the Fall of Beacon. The only known living inheritor of the technique is Yuki Asakura.

Manufacturing Procedure
​(The following is an excerpt from the manuscript recovered from the Asakura Manor's ruins)

​Take the amonunt of metal normall...(scorch marks)...forge to rough sha...(page torn)...heat until it turns the color of daw...(ink splatter)...wet with blo...(ink splatter)...quench in sou...(bloodstain)...carefully let the aur...(bloodstain)...imbue, shape and modify as nee..(rest of page is missing)

​​The process is based of the philosophy “When we let things convey unto us, that is true artistic expression. But when we try to convey ourselves onto things, that is delusion.” Taking the words literally, the craft allows the steel to commune with the soul. The smith shapes the steel, and the steel leads the way. Truly intricate pieces can be made without state-of-the-art equipment, merely by submitting the hands to the steel. Due to this, all weapons made are more than tools. In the words of Yuki Asakura, "They aren't ornaments to be shown off, or edges to shed blood. They aren't meant to beat all competition or do great deeds. They are living beings, shaped by themselves to be the best arms possible."

Properties
Aura Steel has a number of extraordinary properties. To begin with, unless specially made, the alloy is nigh-indestructible, taking only scratches from anti-aircraft weaponry. The other properties like hardness, density, flexibility, conductivity, etc. can be adjusted by the smith. No level of measurement of these characters is outside its spectrum.

Alloys with more than 47% Soulblood can generate energy and force like a Reiter.

The alloy used to make Rione Knight's Anti-Hunter Shot is quite brittle, and when destryed releases a pulse that disables all Dust and limits Aura and Semblance use in the vicinity.

​Drawbacks
Since the articles produced are bound to the intended wielder's soul, they cannot be used by others, so they will just waste away after their owner dies.

Also, the process literally involves having something encroach upon your soul. While this is not problematic for veterans, beginners can die from this.

The energy/force generation drains the user's Aura. If it runs out, it begins drawing power directly from their soul, killing them in the process.