It was rare when someone of Vali's power sensed something this dreadful from something... it was a very, very rare thing to happen, so he decided to act very cautiously in this situation.
When he was done with scanning the entire Middle World, he decided to return back to the Silver Emperor, where he met with his wives, who were already preparing to descend to the Middle World.
Because it was an unnamed one, they were all calling it just the "Middle World".
However, it was clearly noted that it was rather developed, and the temporal bubble around the Middle World was rather strong because all the civilizations within the Middle World were rather developed.
"All of you, be careful when you descend down... I felt something really powerful within that world, so I was careful about every single step. We will conduct an in-depth search of the Middle World."
All four of his spouses agreed with the sentiment because it was the prudent approach, rather be safe than sorry. Due to her experience in the Ecclesiarchy, Rias knew that some of the most unassuming worlds could actually be extremely dangerous and filled with dread and danger.
"This world had around it a Temporal Bubble for nobody knows how long; the natives may be relatively well developed, despite the obvious lack of the supernatural presence that could be hiding from plain sight like we did during the times of the old Draconic Deus."
Latia commented as she was donning her power armor because she was one of the top designers of the Power Armor within the entire Chthonian Empire of Baator, which was an especially remarkable achievement.
"Or there is also a second possibility..."
The first eventuality that Latia said was actually the much better one because the second one was way worse. If the first was true, then it was underbelly that the malicious and powerful aura that Vali felt during the scanning of the Middle World was due to some kind of artifact or natural occurrence.
"Are you suggesting that one?"
While Kuroka and Bellatrix didn't know what the two of them were talking about, Rias only had some suspicions; she had some hunch that it was even more dangerous.
"Yes... If someone of that level managed to sneak into the Kadath Universe, then it would be possible that they would be hiding in the Lower Dimension. Father said that in certain cases, his authority as the Universe Master could falter in some unique locations across the Kadath Universe."
Vali knew that there was a possibility that some unique Tier 12 lifeform managed to enter the Kadath Universe and hide here. The possibility was rather low for such an act, considering the fact that his father was a powerful Tier 13 Primarch, Universe Master, but some unique lifeforms could pull such a trick.
"What Vali is talking about is that there is a certain possibility some powerful Tier 12 being managed to slip into the Kadath Universe and is right now hiding with that Middle World; it could be one of the explanations behind the powerful, malicious aura that he felt..."
Latia explained to her sister-wives, as each of them looked far more serious than before; even Kuroka, who had been half-asleep during the time, perked up upon hearing that because the situation had become several times more dangerous.
However, for their battle-maniac husband, it was actually like a heaven-sent blessing because he would get to fight extremely powerful foes. Not to mention, if it were someone who managed to bypass the protections and defenses of the Kadath Universe, then it would certainly be worth foe.
"I think if this is a real possibility, we should implement infiltration protocols when dealing with this world. Carefully scout what is ahead of us, and only then shall we make a move. While this would take way more time, we can carefully gather information before acting; the situation is already complicated enough as it is."
Rias said with a mild sigh and a frustrated tone because when they arrived at the vicinity of the Middle World, Vali didn't restrain his aura a bit, and if, within the Middle World, a powerful Tier 12 being was hiding, then it would have already long ago discovered them.
So, the moment of surprise was thrown out of the window.
On the other side...
Any Tier 12 being could tell that two of them were related to the Primarch and Universe Master of the Kadath Universe, so there was a very high probability of the unknown Tier 12 being activated very cautiously.
When Vali looked at Ria's, he knew that they were thinking about the same thing; he knew that as long as they didn't cross a certain degree of vulnerability, then they wouldn't be attacked by the Tier 12 entity that could possibly be hiding within the Middle World.
So this would give them enough time and space to conduct their research and confirm many things.
***
The entire Middle World had several enormous supercontinents, and the population of the entire Middle World was in several tens of billions. Considering the world size of the High World, it wasn't the biggest population around, though from what he noticed, there was only one species.
Only humans were populating the Middle World; there were no other species.
Each continent seemed to be under the control of one of the world's superpowers, though here and there, some smaller nations managed to preserve their sovereignty amid the endless fight for absolute dominance and hegemony.
The place where Vali, together with his wives, decided to descend was a continent belonging to the Anjleimaun Federation, in the capital city of the Anjleimaun Federation, Beaugas.
The city wasn't impressive or anything to either of them, though they noticed a few peculiarities of the civilization in the Middle World. The one that was probably the most notable was the fact that their technological level was relatively high, one could say.
Some of their technologies were really backward, around the time of the early 20th century, by the earthly standards of the Draconic Deus, but some things were interesting and appealing even to Latia when she first noticed them.