Somewhere in the Kadath Universe, Lower Dimension of the Kadath Universe.
Since the ascension of the Father of All Devils into Primarch and becoming Universe Master, the entire Kadath Universe was divided into the Lower Dimension and Upper Dimension, mostly to prevent the stronger worlds from exploring the lower and weaker worlds while also giving the smaller worlds a chance for proper development.
The only world that had the ability to travel through the Lower Dimension and Upper Dimension freely, as one wished, was the Higher Dimensional World of the Baator, namely the Chthonian Empire, which could do as they wished.
Due to that, only the Chthonian Empire could freely traverse the entire Kadath Universe as it wished, though, obviously, there were some restrictions on the Empire imposed by the Father of All Devils himself in the first place.
The personal flagship of the Vali Lucifer was actually the Space Fortress of the Phalanx-Class named Silver Emperor, and it was one monstrosity of metal, and various other elements, including some Agreas Crystals.
The ship was manned by a lot of Arcane Mechanical Automatons and Golems, together with the former members of the Khaos Brigade that served as Vali's personal Honor Guards, called the Stormwind Regiment.
Slowly enough, the enormous monstrosity of the spaceship was heading towards one precise Middle World that was located at the edges of the Lower Dimension of the Kadath Universe.
Normally, nobody would typically use even capital ships like this, but Vali Lucifer could use the entire Space Fortress as his personal means of transportation. Such privilege was awarded to only a few people across the whole Kadath Universe.
Space Fortresses were very rare even during these days; there were not many of them, and the Chthonian Empire of the Baator could construct one every few hundred years because it took an extremely long time to construct even one of them.
Right now, each Phalanx-Class Space Fortress has firepower comparable to the absolute limit of Tier 12, and technically speaking, it could destroy large parts of the weaker Universes.
One could easily say that the entire Phalanx-Class Space Fortress was like a miniature city that was capable of spaceflight. The Silver Emperor was no exception to the rule because it was currently housing several thousand people.
He knew that his father and his wives had a preference for traveling mostly alone, without anyone, and with just some of the most trusted personal servants and Mechs.
Vali was rather different in this aspect because Rias and Latia refused to travel without any entourage, while Kuroka wanted to have as many personnel around so she didn't have to do anything personally.
Bellatrix was probably the most spoiled among them...
Still, Vali was right now overseeing the marching formations of the Stormwind Regiment, who were currently in the middle of their training.
Most of the members of the Stormwind Regiment, actually approximately 95% of them were veterans of the Khaos Brigade from the times when Vali was still commander of the Khaos Brigade.
"En March!"
He gave the command to the troops as their training was officially over; Vali decided to rest for the rest of the trip toward the specific Middle World.
"Have you already finished playing on soldier?"
Meanwhile, Vali was training his personal honor guards; his four wives were spending their time having a tea party. This was an activity that Rias and Bellatrix especially enjoyed...
"Whatever... do you have something for me too?"
Even though Vali wasn't too fond of the tea parties and similar occasions among the nobility of the Chthonian Empire of the Baator, where the single thing that they were doing was spreading rumors and gossips.
Kuroka was looking bored as he was, most probably because this wasn't her most favorite activity that she could do. Latia was a curious case about this because while she would have preferred something different, she also knew that it wasn't bad to have some rest.
"We should be arriving at the Midlde World in a few hours at best... the ship's AI has notified me about some weird activity in this sector of the Lower Dimension; it is possible that something powerful is hiding here."
There was some small possibility that a powerful being was born in the Lower Dimension of the Kadath Universe; such occasions were actually pretty rare, but they often happened.
"So, you could have the fight that you carving for..."
Indeed he would, so he was rather satisfied with the situation, that much that he decided to spend the next few hours together with his views and listening to them, which would make them certainly much happier and agreeable for the future...
Endeavors, let's say.
***
The Middle World, where the Silver Emperor was flying, was located on the edges of the Lower Dimension, and it would actually take a few hours till they arrived at their destination.
When the Silver Emperor finally arrived in the vicinity of the Middle World, which became Rias's object of interest, the Space Fortress started slowing. Suddenly, from the Space Fortress, several ten members of the Stormwind Regiment descended from the Silver Emperor and started securing the entire area.
When Rias reported that the entire Middle World was weird by a great degree, Vali took it pretty much seriously because sometimes even the most unassuming matters could lead to some tremendous rewards...
Sometimes, they could even lead to tremendous disasters.
The entire reward was sealed rather fast and easily, as the members of the Stormwind Regiment cast one enormous seal across the entire place, which would prevent anyone from entering or leaving the Middle World for the time being.
He didn't want to take risks with the suspicious-looking Middle World; it was something that was the last thing he had on his plan. Even Vali found it deeply suspicious and disturbing when he noticed that the Middle World was already the size of the High World, and yet...
The presence of supernatural powers was almost zero to null.
"There is something hidden in this world... Its presence is... slightly disturbing."