The Primevals' creations are an ancient and storied catalogue. Every Primeval, by definition of the term, is a creation of the Greatfather Pantheon. Each and every Primeval is created to fulfill a specific purpose, unlike other pantheons wherein gods are representative or otherwise embody specific aspects of the universe. For example, Fold was made to handle the complex nature of Wyvef, and Legion was made to hold many accountable. The last Primeval to be made was Light (Prime (Final)), created to be the perfect Primeval by Pantheon. The reason Light was last is not in fact because Pantheon was successful, but because immediately after being created Light committed patricide and killed Pantheon.
Ah, my father, Pantheon. Yes, yes, he was an interesting fellow. As one of the oldest Primevals, I wish I could say I spent much time with him however... no. I could not say that. Not honestly, at least. He was a man consumed in his work, certainly. Hence why our family is so very expansive! I suppose it only makes sense that he met his end at the behest of his own creation, hm?