Although they were still at the early stage of the Aurous Core Stage, with the help of Ao Duo's cultivation techniques, their strength should not be underestimated. As for familiarity with using new strength, that was their own business, in this regard, Fei Yu could only give guidance, but not be like laying the foundation overnight.

Fei Yu found out from Geiswena that the Demon World was not just a group of iron plate, but also divided into three factions: opposition, neutrality and radicalism. Although they had temporarily reached an agreement on starting a war against the Demon Martial Continent, but there were still some issues of cooperation in various kinds of military operations.

After careful consideration, Fei Yu decided to investigate the situation in the Demon World s first thing in order to see if he could find anything valuable in their mansion.

The residence of the Demon King Sastan was not far from the town where Fei Yu was staying, it was only a few hundred li (Khan, only a person like Fei Yu would dare to say that it was a few hundred li!)

Riding the darkness of the night, Fei Yu slowly and carefully approached Zassler's residence. In the darkness of the night, not to mention being unable to see at night, that was only for normal people. This mansion that was filled with a rough and bold aura felt like it was facing a sleeping Magical Beast that could wake up at any time and choose to swallow it.

Fei Yu hid himself near the Devil King's Manor and used the spiritual consciousness to carefully inspect its surroundings. According to Fei Yu's own estimation, he was only around the late stage of Demon King, if he was not careful, it would be very easy for him to be detected by the Demon King Sastan. Although Fei Yu was confident that he could quickly subdue Demon King Sastan, but that would scare the snake and alert the others, letting them know that he had infiltrated the Demon World, it would be very different from the original intention he had.

No one dared to be careless with the safety of the Demon King. Although a few mere barrier were not enough to stop the absolute experts, ordinary experts would find it difficult to fly into Zassler's manor, and that was the purpose of these defensive and warning facilities. After all, ants did not have the strength to kill elephants, but if there were too many ants, they would not be able to let the elephants rest.

Within the courtyard, the seemingly calm mansion had many dangers lurking around. It could be said that the walls were made of steel, and the security was extremely tight; there were sentries everywhere, countless hidden guards, and even several teams of patrolling guards. Whether it was the open, dark, or patrolling guards, all of them were elites among elites.

You have a good plan, I have a staircase, since the ground is not working, then let's enter from underground! Your Magic Barrier probably can't defend against my earth escape! As expected, Fei Yu used the earth escape to enter the mansion smoothly, and did not encounter any magic or any other obstructions in the process of setting up the warning system.

Although Fei Yu was not clear about the terrain of the Zustan's manor, a powerful spiritual consciousness enveloped the entire mansion, and no matter if it was in the sky or on the ground, there were no signs of a single tree. Fei Yu realized that there were dozens of powerful energy fluctuation s in the mansion, and some of them were even Demon Lord experts, a few of them were even at the late stage of Demon Lord, just a step away from becoming Demon Lord experts, but that distance was not something that anyone could casually cross, if not Demon World would not only have Four Great Devils, it would also require a high talent and the right opportunity.

Suddenly, a powerful energy fluctuation attracted Fei Yu, and the source of the energy fluctuation seemed to be intentionally concealing its own energy fluctuation. If not for Fei Yu's spiritual consciousness being strong enough, he would not have been able to discover it. The spiritual consciousness found out that the energy fluctuation originated from the underground of an unremarkable building in the mansion.

Since he found the Demon King, of course he had to go and take a look. Fei Yu directly went to the surroundings of the building, yes, there were fewer public sentries, but did not think that he would be careless just like that. Fei Yu's spiritual consciousness saw that there were many times more hidden guards around the building, and the patrolling Cultivation Level were obviously much higher than the rest.

Although he did not personally see it, everything that happened inside was transmitted to Fei Yu's mind through the spiritual consciousness. A tall Demons sat upright on the armchair in the room, it was the Demon King Sastan. In front of Zassler, a subordinate was reporting something.

"What happened to the other groups?" Zassler asked.

"The Motel family and the Gouris family have been recruited, and are engaged in intensive drills between the new and old soldiers. The preparation of the strategic materials is nearing completion, and I believe it will be done soon. The Gritt family is also nearing the end of their recruitment, and the preparation of the strategic materials should be half completed in the next three months. Lord Guidry's side is progressing as well as the Motel family and the Gouris family."

"What about our preparations?"

"The conscription has been completed and the strategic materials have been prepared. However, the conscription is still ongoing, and we will continue to gather as much as possible according to Your Majesty's instructions."

"That's right, leave half of the elite guards in the City Guard and send them to the reserve. This time, we are not allowed to go with the army, and we are also not allowed to gather any more strategic goods for safekeeping, in case of an emergency."

"This …?"

"Jie Desike, after following me for so many years, you should have a thorough understanding of the situation at the end, right?"

He was a member of a branch of the Lucifer family. Since childhood, he had accompanied Zassler on his travels north and south, and was one of Zassler's trusted aides. He was completely loyal to Zassler and had a very high status in the Devil King Sastan Manor.

"I know a bit."

"Then you should know that not only will we do the same this time, the other Infernals will also do the same. War, regardless of victory or defeat, was inevitable, regardless of human, material or financial resources. For example, during the Great War of Gods and Demons a thousand years ago, the Demon World suffered heavy losses at the end of the war. Only after experiencing hundreds of years of chaos did it finally calm down. This war against the Demon Martial Continent was inevitable to be a calamity, and after the war, who knows how many more Demons armies will survive, and at that time, the wealthy Demon World will inevitably start a dispute for all sorts of benefits, and it is unavoidable, we need to prepare in advance, otherwise the war will end right at the moment we die! "

"Understood."

"Hmm? How are you preparing to seal the Primitive flying dragon tomorrow? "

The Primitive flying dragon, like the Ancient Giant Turtle Beast, was also one of the great ancient history's Divine Beasts, its height was slightly shorter than the Ancient Giant Turtle Beast, its entire body was covered with fine scales, with wings that allowed it to fly, and its speed was extremely fast. A mature body could use all sorts of spells other than Wind Magic, and at the same time, had a body as tyrannical as the dragon race.

"Preparations have been made, there will be 10 Demon Lord s accompanying the King, of which 5 are melee warriors, 3 have late stage Demon Lord Cultivation Level, 4 are ranged attacks on the Magician, 2 of them have late stage Demon Lord Cultivation Level, and 1 is Dark Sacrifice."

"Un, let's do it like this. We must hide the things that we said earlier and not let anyone discover it. At the same time, we must pay close attention to the movements of the other Demon Kings and not be careless. "Alright, you may leave now!"

"Yes, this subordinate will definitely be careful." Jie Desike bowed and left the secret room.

He, who had carefully studied the history of the Demons, knew how many times the Demon World had fought external wars. On average, there would be one large-scale external war every thousand years, but every war did not bring about a generous return, but rather, it brought about a drastic decline in the Demon World's elite, as well as a huge depletion of resources. The small amount of resources gained from each foreign invasion was not enough to make up for the losses the Demon World had suffered during the war.

If he had enough profits, he would be the first to start a war. However, this did not mean that he was a simple-minded person with well-developed limbs, being able to become the leader of the Lucifer family, relying only on his powerful Cultivation Level was not enough, he had always been cautious when facing a war like this, a war that he did not have the confidence or gains would not easily start. Once it was launched, it would mean that he had enough confidence in winning.

However, in this war, Zassler had no confidence at all. However, as an outstanding general who had experienced a lot of battles, Zassler had a premonition that if the war were to start, it would be a calamity for the Demon World. There were too many uncertainties in this war, provoking a war between the different races in the Demon Martial Continent. It used up most of one's life force, but how much of it could be used up? Although the Demon World's army was strong, there were too few of them. It was only a fraction of the Homo sapiens's army, not to mention that there were other races' armies in the Demon Martial Continent!

The fighting strength of the orc's army was in no way inferior to the Demons's army; the magic and bows of the Elves was also far superior to the army of the Demons; and there was also the dragon race, which was an even more tyrannical race that the Demons could not rival. Fortunately, the members of the dragon race never easily participated in the wars of the various races, and there were only a few thousand of them in total.

However, this did not mean that the Demons would win the war, the Homo sapiens was not so easy to deal with either. When they were carrying out their plan, they just happened to find a who had a tyrannical strength, Fei Yu, who was actually able to easily defeat a Demon Lord and a few Demonic Commander s by himself. Perhaps this person already had a certain understanding of the schemes of gods and devils, so with this person's existence, would the plans of the gods and devils on the continent continue smoothly?

In the silent night, there was a quiet forest not far from Zustan's manor. All the living creatures had entered into their dreams, and a shocking scene suddenly occurred. A human shaped object quickly rose from the ground.