The Death Tide spread throughout the Ten Directions Island Domain, and it would indeed have a huge impact on the environment of the entire domain.
However...
The holy war that had erupted inside and outside the Ten Directions Island Domain had long since reduced the entire domain... aside from the area within Tian Yuan City's defensive perimeter... to complete ruin.
With survival hanging in the balance, there was no need to care about the environment.
Holding their territory was the top priority.
Although the arrival of a True King Realm expert had been somewhat unexpected, Great Lord Mu had naturally anticipated what would happen when an enemy beyond the usual limits descended.
Since the main battlefield would most likely be the island domain, he naturally had to make full use of his geographical advantage.
The "spring" that had appeared earlier and spewed out pillars of black tide was one such measure.
The "Nether Gates" that had appeared throughout the island domain were another.
And it was not just the Nether Gates.
Across many regions of the Ten Directions Island Domain, even on lands that had been battered by energy storms and caught in the Saint Realm bombardment, lands that had long since been shattered beyond recognition, vast pale plains covered in bones and mountains piled with skeletons now emerged.
These were measures Deathbone had laid out in advance.
The springs, Nether Gates, White Bone Wasteland, and Skeletal Mountains were all parts of his great power, the "Underworld on Earth"!
The Underworld on Earth had existed on the land of the Ten Directions Island Domain for a long time.
The netherworld stood here, and it also occupied a higher level here.
Even though certain regions had been struck by Saint Realm power in the previous battle, causing the land to collapse