In the history of the Demon Slayer Corps, breathing techniques can all be traced back to their origins.
Until a young man brought a mainstream that subverted cognition: Breath of Steel.
This is not a gift of talent, but a "man-made miracle" that has been tempered over time. The young man turned all the 427 processes of forging the sword into combat skills: Type 1: Thousand Hammers to Break the Formation; Type 2: Quenching Spin; Type 2: The Furnace of Heaven and Earth, hammering evil spirits thousands of times until the structure collapses and spirituality is annihilated. …
When Twelve Ghost Moon mocked "steel is fragile" with the blood ghost technique, the young man's blade squeaked softly, and his whole body glowed with a metallic cold light: "You made a mistake."
"This is not a creation of nature. It is the crystallization of human wisdom, will and thousands of beatings - it is specially designed to kill ghosts and kill aesthetics."
Look how the steel neighs and cuts off the immortal!
