The Rengoku sword, wielded by Flame Hashira Kyojuro Rengoku, is one of the most symbolic and powerful blades in Demon Slayer: Kimetsu no Yaiba. Unlike an ordinary katana, this Nichirin Blade was infused with the essence of flames, perfectly matching Rengoku’s fiery personality, combat philosophy, and mastery of Flame Breathing. The unique powers of the sword are not just in its cutting...