Gu Yuexi had once read about "cave-heaven worlds" in ancient texts.
They were very similar to Secret Realms, yet fundamentally different.
A cave-heaven world possessed its own complete and self-contained Heaven and Earth Laws, forming its own separate heaven and earth. It was a world that could exist completely independently.
Secret Realms, on the other hand, often had incomplete laws and were merely "fragments" attached to a greater world.
Cave-heavens are like kingdoms, fit for habitation and inheritance; Secret Realms are like mines, useless once depleted.
Some cave-heaven worlds formed naturally.
Others were carved out or refined by mighty experts of antiquity through extraordinary means.
And this Witch Ancestral Land... was likely such an existence.
The method of entry also served as a partial confirmation.
Secret Realms had spatial rifts as entrances and exits, but entering a cave-heaven world required a special method.
...
