So I just did Siegfried's first interlude and want to make sure I got this info right. Can someone confirm/deny?
-Sufficiently powerful dragons can spawn wyverns on their own.
-With enough mystery, a wyvern spawned from Fafnir will become a new Fafnir. Thus Fafnir is not an individual but more like a phenomenon
I would assume the original Fafnir was the dwarf-cursed-by-ring from the Volsungsaga who Sigurd killed, and that started the propagation.