World Classification, Taiyi Opens the Heavens

Of course, even if they set up the Primordial River-Luo Grand Formation in the world they created, allowing it to transform sufficient Innate Spiritual Qi and Dao Rhyme Spiritual Essence,

cultivating and comprehending the Dao in a Middle Great Thousand World would absolutely progress far more slowly than in the Primordial World.

This was especially true for cultivators at the Golden Immortal and Taiyi Golden Immortal realms.

Cultivators had realm rankings to distinguish strength from weakness, and worlds likewise had classifications to distinguish their relative power.

From weakest to strongest, worlds were divided into Small Worlds, Small Thousand Worlds, Middle Thousand Worlds, Great Thousand Worlds, Cosmic Heavens and Earth, Multiversal Cosmic Worlds, and Eternal True Realms.

Among them, Small Worlds ranked below the Immortal Dao; Small Thousand Worlds were equivalent to Heavenly Immortals through True Immortals; Middle Thousand Worlds were equivalent to Golden Immortals through Taiyi Golden Immortals; Great Thousand Worlds were equivalent to Great Firmament Golden Immortals through Primordial Golden Immortals; Cosmic Heavens and Earth were equivalent to Hunyuan Great Firmament Golden Immortals; Multiversal Cosmic Heavens and Earth were equivalent to the Chaos Realm/Heavenly Dao Realm; and Eternal True Realms were equivalent to the Great Dao.

Moreover, worlds of every level were further divided into four tiers: Primary Tier, middle, High Tier, and top-tier.

A Middle Great Thousand World was only equivalent in rank to a Late Great Firmament Golden Immortal through a Perfected Great Firmament Golden Immortal.

(PS: At equivalent ranks, a world's origin and power far surpassed those of living beings.)

Such a world might produce a Great Firmament Golden Immortal powerhouse, but not only were the odds low, even if one could be born, it would require an exceptionally long time.

Although Golden Immortals and Taiyi Golden Immortals were not the limit in such a world,