Ten thousand years ago, Spider Den had been an ordinary planet at the edge of the Flying Star Sector, far away from the star and without atmosphere, until one of the fleets of the Star Ocean Imperium landed accidentally to avoid a cosmic storm.
While waiting for the prolonged cosmic storm to pass, one of the bored Cultivators in the imperial army, who was adept at the spiritual energy of the earth class, considered roaming below the surface great entertainment.
But when he performed his techniques again and cruised below the ground as if he were sailing, he hit an invisible wall.
The Cultivator, who was almost buried alive, after being dug out, shouted to his rescuers without even having the time to care about his swollen head. "There's a mountain below the ground, a mountain made entirely of Divine Cloud Stones!"