"My brother also has an unfinished hundred poison treasure, the Deadly Centi-Poison Immortal-Slayer Sword."
The Deadly Centi-Poison Immortal-Slayer Sword was refined by Xu Feiniang, the disciple and lover of the Mount Wutai Master of Primordial Chaos. The three immortals of Mount Emei spent a long time studying it to counteract this flying sword.
I don't know how the game designers arranged it, but it is also mixed into the Hundred Poisons Seven Treasures in Barbarian Mountain.
Among the Hundred Poisons Seven Treasures, it is not hard to imagine that the power of the Deadly Centi-Poison Immortal-Slayer Sword is the most significant and the only item with the hope of breaking through the ninth rank limit.
"Isn't your brother a disciple of the Five Poisons Sect? How can he refine the Deadly Centi-Poison Immortal-Slayer Sword?"
