If you want to read novels about primeval myths, I recommend the following: Tearing the Investiture of the Gods at the Beginning of the Primeval World, Sage of Chaos, Primeval Dao Lord of Heavenly Secrets, and Primeval World: Return of Chaos, Killing Jiang Ziya at the Beginning. The protagonists of these novels all had powerful cultivation, involving concepts such as chaos, primordial essence, innate saints, and postnatal saints. I hope you like my recommendation. Muah ~