C821 Inconspicuous Bar
In fact, Nine Swords of Immortal Slaughter and Immortal Slaughter Sword did not have any relationship at all. Other than the name "Immortal Execution", there was no other relationship between the two.
If one had to say if there was a connection, it would be that one was a sword and the other was a sword. That was it!
However, now that he had the Dou Huang Incantation