World Knot: "Ancient relics wich allow near-instant movement from place to place." (Myth tfl manual).
Who or what made the world knots? Since they are ancient relics it is not likely that they are created by human hands. Mutch older than man, the trow could have been there when these things were created. But if they were made by trow hands, the dark would have learned to use them much sooner and they would have been able to crush any resistance by simply transporting their forces to Covenant...
So are the world knots from before the trow age?
And by the way, how did the humans learn to use such ancient relics?...