"In Divine Forging Sect, there's a sacred lake called the sword-cleansing lake. Every sword forged within our sect must be submerged in the lake, where it is nurtured by the spiritual energy within the water, gradually giving birth to a sword spirit. But not every sword is capable of manifesting a sword spirit.
Some swords, when placed in the lake, might suffer irreversible damage, rendering them useless. To repair or upgrade your Dragon Slayer's Sword, it must be immersed in the sword-cleansing lake before I can apply my blacksmithing skills to it," Silver-Mallet clarified.
"So, all we need to do is go to the sword-cleansing lake to restore my Dragon Slayer's Sword, isn't it?" Jacob asked.