"The reason why Golden Core Stage cultivators are not allowed on that Secret Realm Island is most likely because the owner of the island wants to choose a suitable successor."
"Once we cultivators successfully form our cores, our foundations are set. If we then try to switch to cultivating another technique, it's not only extremely dangerous, but also almost impossible to progress to Nascent Soul Formation!"
Luo Qingni didn't hide anything and quickly shared all that she knew.
This situation was not far off from Zhou Chun's own speculations.
According to information he had seen in some ancient texts, private secret realms that restrict access based on cultivation level are indeed usually set up by the owners of the realms to select their successors.
Another scenario was like the Heavenly Spirit Secret Realm he had visited before. As a trial realm, it also had specific cultivation level requirements, being neither too high nor too low.