We know Sasukes sword is called kusangi even tho it never showed the ability to stretch like oros. I was thinking since Orochimaru sword has the property to stretch he could cut off the piece of the blade and fashion infinite new swords from them.
And Sasuke getting a piece of the kusangi sword and like a branch that's cut off a tree cant grow so cant the blade after its removed from the main body but retains its durability.
And Sasuke getting a piece of the kusangi sword and like a branch that's cut off a tree cant grow so cant the blade after its removed from the main body but retains its durability.