The sky was a murky yellow.
The Divine Energy within this realm was incredibly dense, even comparable to that of an Earth-rank zone.
However, this Divine Energy carried a fatal essence, deadly to any cultivator who inhaled it.
This was the reason why the heavens and earth appeared so oppressively yellow.
Granted, absorbing just a trace of it wouldn't pose much harm, but prolonged inhalation would make filtration impossible, leading to death.
Thus, the Immortal Realm did not personally enter the Divine Veins to extract the Divine Ore Essence but instead threw slaves from various realms here, forcing them to absorb this essence continuously while mining.
They weren't even given time to rest.
Lu Changsheng looked down at the dark, teeming crowd below. Each person's eyes were void of spirit, akin to the walking dead, repeating the same mechanical actions to extract the Divine Ore Essence.