After leaving the Desolate Crow Clan, Leon's next destination was the Western Frontier of the Crawford Empire—No, of the entire Human Domain.
After all, It was the linchpin safeguarding the Human Domain from the beasts.
He had to visit the Great Wall and check on the situation before making his way to other destinations in the Human Domain.
Before Leon left, the battle between the Blue Luan Monarch and Three-Legged Golden Crow Monarch had devastated the land.
But after Leon returned with Aria and Darlene, he noticed the land had been restored.
Even so, the Great Wall remained slightly crooked at the center point despite the enormous crater being filled with earth again.
The central part of the Great Wall was no longer as tall as it used to be, but it was still standing tall. Leon could tell that the Western Frontier worked hard to restore the place.
However, it wasn't long before he realized that it wasn't just a simple landfill. The Western Frontier had installed numerous traps underneath.
Thus, even if the central part of the Great Wall weren't as high as it used to be, it still wouldn't be easy for the beasts to breach its defense.
At that moment, there was no one around to welcome Leon, Aria, and Darlene at the Elder Tree.
When they flew over to the Great Wall, they saw an ongoing battle between General Marquis Hendrick's soldiers and the mutant rats.
"Didn't we already exterminate the mutant rats? So how come there are still so many?" Aria uttered with surprise.
Despite what she said, there were only around a million mutant rats, only a tiny fraction of the former mutant rat tide.
"It's impossible to exterminate all of the mutant rats when their nest is hidden deep in the subterranean region. As long as we don't destroy their nest, they will keep breeding like a plague." Leon stated.
However, Leon quickly corrected himself, "No, even if we destroy their nest, they will still reproduce as long as the mutant rats live."
"Then, should we start looking for their nest?" Darlene suggested.
"Hm, this isn't exactly a bad situation," Leon said with a contemplating look and added, "This gives the soldiers on the Western Frontier battle experience. We can look at this as a form of training for them."
"However, rats are known to be carriers of diseases because they eat anything. Wouldn't it be a problem if there's a plague? A plague caused by rats could be extremely deadly if left uncontrolled," Darlene mentioned.
She recalled the incident in the Desolate Crow Clan.
If Leon hadn't been there to promptly treat the Desolate Crow Clan, perhaps the plague would have wiped out the entire Desolate Crow Clan.
"I understand your concern, but it's not something we need to worry about," Leon replied with a smile.
"The Western Frontier is not like the Desolate Crow Clan. An unclean environment has higher chances of giving birth to deadly diseases. However, that won't happen here."
At first, Aria was also puzzled over the same matter. But when she sniffed in the fresh air, a light bulb lit up in her head.
"It's the quality of air. The rich spirit energy from the Elder Tree and World Tree is very preventing this place from being corrupted by foul energy," Aria stated.
After listening to Aria, Darlene quickly discovered Wrathful Demonic Energy was absent in the region.
"That's right," Leon nodded.
"The World Tree has produced abundant spirit energy during the time we were gone. The spirit energy density is already at this level in the Western Frontier. Thus, it's safe to assume that spirit energy from the World Tree has already covered the entire Crawford Empire."
"This spirit energy doesn't just form a protective barrier against the current sun's harmful rays of light and Wrathful Demonic Energy. All the people living within it will also be healthier and enjoy longer lifespans."
Given such a blessed environment, normal diseases would become nonexistent. Furthermore, the risks posed by mutant rats would also be reduced to a minimal.
Nevertheless, the rich spirit energy in the area was the least of his surprise. Knowing the World Tree's capability, the density of spirit energy was well within his expectation.
While Leon, Aria, and Darlene observed the Great Wall's situation from the sky, their presence didn't remain unknown.
A figure quickly flew over from the wall to greet them.
"The General Marquis welcomes your return, Your Highness!" General Marquis Hendrick stated with a fist-palm salute and head lowered respectfully.
"At ease, General Marquis," Leon stated coolly.
At the same time, Leon quickly gave the General Marquis a quick inspection with his divine sense before he nodded with approval.
General Marquis Hendrick reached Mid-rank Preliminary Accession-level Transcendent in his Wind Law and Rank 1 Body Transformation in body cultivation, albeit barely.
Nevertheless, an Early Rank 1 Body Transformation expert in the bone-forging phase possesses the same strength as an Early Rank 2 Transcendent beast.
The General Marquis's improvement was not small, but it wasn't great either, just within the acceptable range.
"I can see that the Blue Luan Tribe have left," Leon mentioned.
There was no further reason for the Blue Luan Tribe to guard the Western Frontier since the Great Wall was restored.
Shortly after, Leon casually added, "I can also see that you have made some improvements in your cultivation. But what about your men? What has happened in the past four weeks?"
"Thanks to the supply of Transcendent Crystals from the Capital, we currently have over 200 Transcendents within our ranks, 100 of which are Earth Transcendents, Your Highness. Thanks to them, we were able to restore the Western Frontier quickly."
"Apart from these 200 Transcendents, we also have over 14,000 soldiers that reached the Transcendent-level in body cultivation. However, only 100 other men successfully reached Rank 1 Body Transformation like me, Your Highness," General Hendrick Marquis reported.
"Oh? So few?" Leon uttered.
Given the benefits derived from the Three-Legged Golden Crows, he didn't expect so few to have reached the bare minimum of Rank 1 Body Transformation.