Magical Material: Bone Steel
Bonesteel is Steel that is created using bones of various creatures to supply the carbon. This makes the metal both normally tough, and supernaturally so. When Bonesteel is crafted, It imparts traits of the creature whose bones were used- such as Elephant Bones making the material heavier and tougher, Cat bones making it lighter and sharper, or Dragon bones making it hot and menacing.
Because of this spiritual imbuement, Bonesteel has an impact that isn't entirely just physical, hitting on a spiritual level as well, thus making it one of the few materials that can hit intangible targets such as ghosts or shadows.
Lastly, Bonesteel as a material is capable of being repaired without being reforged, simply requiring a source of Calcium (usually milk or bones). In order to repair Bonesteel, you require bones or milk to be powdered and then lay it into the broken sections of the blade, which will then slowly ossify and repair over the next few weeks.
If you use bones/milk of the same species as the Bonesteel was made from, the repair will be up to 10x as fast. For this reason, Bonesteel is often created at least in part with more common creature's bones.
However, while Bonesteel can technically be made with as many different bones as you desire, each species added intensifies the difficulty by a massive amount. Single creature Bonesteel is remarkably easy to craft, no harder than normal materials, but each one is around 5x harder.
2-Creature Bonesteel is 5x harder than a regular weapon, 3-Creature Bonesteel is 25x harder, 4-Creature Bonesteel is 125x harder, and so on.
Bonesteel is primarily used in 3 ways;
Weapons and Armor, imbuing fighters with the spirits of the bones used
Spellcasting Tools, enhancing the magic and it's effects with the spirits traits
Vehicles, allowing them to have capabilities unavailable to ordinary engineering
Special Notes
Often Alloyed with Cold Iron, using the Blood and Bones of the same creature










