Underworld, dark and uncertain, extends to deep and unfathomable.

　　It also refers to the place where the deceased went.

　　I.e., the Underworld.

　　"The meaning of the knife of the underworld, could it be that it means the underworld leads the way? Delivering burials, transcending the dead, and pointing the way ...... This is a knife of killing death."

　　Li Mu held the Underworld Sword in his hand with all the comprehension in his heart.

　　He ...