Although the Grand Uncle never returned after leaving, he still left some assets behind for the Sword Sect.
Such as the invincible black thread design blueprint and the refining dharma method.
Such as this Black Sword.
And regarding this Black Sword, true name [Inverse Life], perhaps because its sword soul was separated by Wei Zhuang and taken with him, resulting in a significant drop in power.
Or perhaps it was due to the loss of documents from those years, coupled with the fact that there were simply too many black-colored swords in the Sword Sect.
In any case, this Black Sword was treated as an ordinary magical treasure and tossed into the Sword Sect's armory, gathering dust for countless years.
Until one day.
Out of boredom, Chen Qianhu used the roll of a dice by chance and took out this Black Sword.
And placed it into a secret realm he personally designed, as a treasure gifted to some genius youth...
