The longsword "Providence" used by Li Lin has a function known as low-frequency vibration.
By adding high-frequency vibration to the blade, it cuts and destroys the target at the molecular level; this is the well-known concept of "high-frequency cutting." Building on this foundation, it detects the composition of the target material and calculates the frequency needed to reduce the intermolecular binding forces of the material, thus causing a liquefaction phenomenon—this is the mechanism of low-frequency vibration. A knife equipped with this function, even if it just lightly touches the surface of biological tissue, will turn the object into a pool of blood and pus, while inorganic materials lacking water content will simply shatter into fine sand.
