Game/Book Inspiration: This is taking mixed inspiration from the books and games, using the personification of the Cat School from the games to make up for the lack of detail in the books. Some aspects from the games are carried over, though changes have been made. The key example is the Silver Sword. In the books, silver swords are a specialized tool, made of a steel core plated in silver. Silver is a soft, rare, precious metal. Only a handful of swordsmiths can properly forge them. Because of its lack of durability, it is used sparingly; the silver edge is difficult to maintain and dulls easily, and would be costly to replace. A single strike against another blade or iron plate would dull, chip, blunt, or even break the sword instantly. Usually, Geralt leaves his silver sword wrapped in cloth and hung from the saddle of his horse, Roach, opting only to carry his steel sword on his back, to avoid damaging it. He only takes it out to deal with certain monsters.
Silver is highly specialized in the books. Most monsters can be handled with steel; among them Necrophages (Ghouls, Alghouls, Drowners, Rotfiends), Draconids (Wyverns, Forktails, Cockatrices, Slyzards), and Hybrids (Griffins, Harpies, Sirens, Succubi). Like in the games, steel is also used for natural beings (Humans and Nonhumans like Dwarves and Elves, and mundane beasts like wolves, bears, and the like). Geralt makes a point that both his swords are for monsters, because a man can be just as monstrous as any Striga. However, Silver is required for certain beasts, such as Wraiths (which do not have a base physical form), or Cursed Ones (like Lycanthropes or Strigas). They are also used for lesser vampires (such as Burxae, Alps, or Ekimmaras), though Higher Vampires (true vampires, with human forms) are immune to silver and require steel or other methods to kill.