Ethan already knew about the grades of the Secret Realms from Primor, and they were: Lesser, Intermediate, Higher, Supreme, and finally, Divine Grade.
The reason every Secret Realm gave birth to a Nature Spirit was simple—to nurture, manage, and most importantly, upgrade the realm.
However, that was easier said than done.
Even upgrading a Lesser Grade Secret Realm to Intermediate Grade required decades, sometimes even a century, depending on the circumstances.
And as for upgrading it to a Supreme Grade Secret Realm or a Divine Grade?
It was a feat that would take tens of thousands of years, if not more.
In short, according to what Ethan learned from Primor, it was basically impossible for a Worldly Secret Realm to reach the Divine Grade.
The Quasi-Divine Grade was the maximum threshold they could realistically achieve.
Even that, by itself, was already a monumental achievement—the kind that most Nature Spirits could only dream of.
