The World Secret Realms are classified into the various grades: Lesser, Intermediate, Higher, Supreme and Divine Grade.
The grade of the Secret Realm is connected to the Nature Spirit born inside the World Secret Realm.
For the Primordial Beast Realm, Primor was the Nature Spirit, and as Primor's Grade increases, the World Secret Realm would also increase.
Currently, Primor is an Intermediate Grade Nature Spirit, and thus, the Primordial Beast Realm is considered an Intermediate Secret Realm.
Occasionally, the Nature Spirits could get enlightenment on how to upgrade themselves, and of course, sometimes, the enlightenment might not give the full details for their upgrade.
"What? Really?"
Hearing that, Ethan was thoroughly shocked because he was not expecting Primor to receive enlightenment regarding his upgrade.
