I was speaking with a friend recently about Myth, and mentioned Nyx, and he asked what role exactly Nyx played in relation to Wyrd. Specifically, he said "Nyx = Wyrm?" I asked what he was talking about, and he elaborated...
Apparently in whatever mythology the name "Wyrd" is taken from, there are three prime gods - Wyrd ("weird"), Wyld ("wild"), and Wyrm ("worm"). Wyrd is the Creator, as he in in Myth. Wyrm is the Destroyer - more closely related to the Leveller in Myth. Wyld, as her name suggests (and again, we have a female god here), is not the preserver like the Buddhist trinity, but is a random element, either progression or regression, marking only that time is passing on and things are continuing and stuff is happening (basically, she is the wild, just whatever happens in nature).
Could this be our Nyx, about whom we know so little?