"The Western Land is extremely unstable right now, and from time to time, high-strength spirit beasts break through the array and massively invade the borders of the Imperial City."
Ming Yu was sent to the Thousands of Miles of Yellow Sand primarily to resist the Rattlesnake lineage.
If the Western Region Imperial City were attacked, and there were changes on the Thousands of Miles of Yellow Sand side,
the Imperial City would be in grave danger, besieged from both sides.
After decades of battle, Ming Yu succeeded.
The Supreme Being of the Rattlesnake lineage fled with severe injuries.
Even if the Heaven-Defying Giant Serpent remained in the Thousands of Miles of Yellow Sand, it would take him more than a dozen years to recover.
Furthermore, with his forces destroyed, he had no lackeys to serve him.
It was nearly impossible for him to arrange an extreme place for healing.
Relying on his exotic force for healing would take him decades to recover.
