Reiger told Liz this.
In the Demon Slayer World, many breath technique swordsmen would make modifications to their fighting styles according to their own conditions and habits.
For example, the user of the Rock Breath, hailed as the strongest among the Demon Slayer Corps Swordsmen, Himejima Gyoumei, wielded a Sun Wheel Blade that was connected by a long chain to a broadaxe and a meteor hammer. The blade contained a grade of scarlet iron sand with an exceptionally high purity and weighed considerably more. Even Kokushibou in the original work thought that it was a weapon difficult to find even during the Warring States period, proving that the swordsmen who initially used Rock Breath did not start with this type of weapon.
