The Falchion Knife
The Exceedingly Rare Special Item group contains only the Falchion Knife, as a plain knife and in the classic finishes, among them Fade, Slaughter, Case Hardened, Crimson Web and Blue Steel. The Falchion Knife also shows up in the Spectrum Case, where it comes in Chroma finishes instead.
Collection and related cases
The weapon skins belong to The Falchion Collection, and every one of them also has a StatTrak™ version. Other cases with a single knife type include the Huntsman Weapon Case and the Shadow Case.