The Ancient Purity Blade was Immortal Emperor Gu Chun's True Treasure.
The Ancient Purity Blade is praised as one of the world's greatest weapons. Even Li Qiye praised it as one of the best Immortal Emperor True Treasures in history.
Immortal Emperor Gu Chun left the sword in the Gu Chun's Four Branches.
Immortal Emperor Gu Chun's descendant, Puresun Daoist, is the current owner of the Ancient Purity Blade.
Links 1 Appearance(s) of Ancient Purity Blade