The original guardian formation of the Heaven Court is certainly no longer usable. The essence of the formation lies in matching with Heaven and Earth, and now the Prehistoric World has been altered so chaotically. Existing formations can basically no longer match with Heaven and Earth, so naturally, they need to be modified, and significantly at that.
This is undoubtedly a monumental task, but it doesn't matter because those involved are all powerful figures.
Take Fuxi the Heavenly Emperor, for instance. He is now a peerless expert in the eighth realm of Primordial Chaos and holds the Innate Treasure, the Innate Nine Palaces Eight Diagrams Chart.
Now, his understanding of the Great Dao is undoubtedly at a profound level. Even before the breakthrough, he could comprehend the supreme formation like the Cycle Star Array, and now that he has broken through, he can naturally deduce an even stronger formation.
