What was the Star-Hidden Sea?
The Five Palaces Sea corresponded to the torso, while the Star-Hidden Sea corresponded to the limbs.
But just as the five viscera did not correspond to the five Inner Palaces, the Star-Hidden Sea was also unlike the limbs, existing as a whole unto itself.
At first, the Heaven-Connecting Palace resided in the Spinal Sea, also known as the Heaven-Connecting Sea.
Then, after pushing open the Heaven and Earth Gate, the Dao Vein became a Soaring Dragon and swam into the Five Palaces Sea.
The feedback from heaven and earth gained when one pushed open the Heaven and Earth Gate gathered into the Heaven and Earth Isolated Island.
This island floated atop the Five Palaces Sea. One had to support it with Dao Essence, and it was where the Soaring Dragon Dao Vein dwelled.
Cultivators guided their Soaring Dragon Dao Veins deep into the Fog of Ignorance, clearing away the haze and knocking open the Five Palaces one by one.
What came after the Five Palaces were complete?
Once the Soaring Dragon Dao Vein accumulated enough power, it would leave the Heaven and Earth Isolated Island and swim into the next of the four seas within the human body—the Limbs Sea, also known as the Star-Hidden Sea.
What did it mean to establish a Saint Tower?
What was a Starlight Saint Tower?
The Inner Palace realm was a cultivator's exploration of their own self.
The Outer Tower realm, in turn, was a cultivator's expansion from within to without.
Through secret arts, cultivators established a connection with the distant Starry Sky and projected their will into its far reaches. They manipulated Star Power to build what was known as a "Saint Tower."
What did it mean to establish a Saint Tower? After exploring themselves, cultivators gained a