With a battle plan, it was still very smooth for Yiqiē to act. Soon, the troops who would participate in the campaign were drawn out. And the masters who will go are Mu Feng and Qin Shuang, as for Crimson and other fifth-order powerhouses, they still stay to protect the safety of the headquarters, saving the demon army from suddenly appearing in a sneak attack. Regarding the IQ of the demons, Mu Feng will not underestimate it anymore.

Mu Feng summoned the Flame Phoenix and led the air force to fly first, because the demons were cowering in the underground palace similar to an underground city, so the flying army could go over first.

After waiting for more than ten days, the flying army was the first to reach the top of the dungeon, and from the outside, it seemed that this was just a very ordinary corner of the dark highlands, and there was nothing special at all.

In fact, thousands of kilometers below this ordinary surface, there is a huge underground palace like a city, and there are more than 10 million demons living in it. And this dungeon is connected to the underground network of demons, which seems to be a more important place.

Before the ground legion arrived, it was naturally impossible to go underground and start a war directly. Mu Feng still decided to go down first to find out what this dungeon was used for. Why risk arranging tens of millions of demons in this place.

As for how to enter the dungeon, Mu Feng has many methods, Mu Feng, who has an accurate route map, found a relatively close entrance, walked through the underground passage at a very fast speed, and quickly arrived at the destination.

Sure enough, this is a new underground world that has never been seen before! In the middle of the sprawling lava river are large and small rocky islands. And the demons live on these islands.

And in the huge underground hole, you can faintly see traces of giant beast bones on the wall!

In other words, the formation of this dungeon turned out to be because it was originally a giant beast's corpse buried deep underground, and finally decomposed to form an underground palace in the location of its corpse. And this dungeon was able to not collapse so deep underground, precisely because of the tenacious skeleton of the giant beast, which supported this space!

And what are the tens of thousands of demons living here for? You know, it doesn't seem like a good place to live. If you move to the top, you should be able to live a more enjoyable life. Although there are many demons, they occupy a lot of space, so you don't have to worry about running out of land.

Mu Feng, who used a special ability to turn the light back so that people couldn't see him, quickly got the answer. The reason is that there are too many types of demons, and most of the demons living here are fire-based. My favorite environment is surrounded by fire and lava. The hotter they get, the happier they are, and they are not afraid of the heat at all. Mu Feng saw that these demons were coming and going to various small islands, and he didn't need any help at all, he just jumped into the magma and swam over......

If this is an ordinary person, the moment he jumps in, he will be vaporized by the high temperature of magma...... The lava underneath is not magma that has cooled down on the ground and is about to solidify, but the temperature is terrifyingly tens of thousands of degrees.

Mu Feng was curious about what these demons relied on to survive even if they liked the environment here. In the end, I realized that I was wrong, this is the world of Skyrim after all, and there are too many creatures that I have never seen before. In addition to the demons, there are other creatures that can withstand the heat in the magma, and they have become the food for the demons.

In this way, it seems that these tens of millions of demons have instead become self-sufficient citizens in paradise. But since the Demon Legion has connected the underground network here, it must have a special significance. Mu Feng now wanted to know the reason.

The combat power of these tens of millions of demons is still good, otherwise they would not be able to catch prey in the magma as food, and the demon lords of the demon legion, especially those demon lords who have lost a large number of their subordinates, it is impossible not to receive these demons into their subordinates, so as to enhance their strength and right to speak.

Sure enough, Mu Feng found the reason in the strange behavior of these demons. These demons live here, and they really have a purpose!

There are many treasures on the body of that mysterious giant monster. For example, there are still many bones in its skeleton that still have fresh marrow. It's just that the bones of the giant beasts are so hard that it's not so easy to get them out.

These demons will dig small holes in the bones of the raised hands, slowly drain the marrow inside, and then put them in special containers and keep them under strict care. There must be demons who come and carry these things away on a regular basis. These demons were only ordered to mine here, and did not enjoy the rights to these.

In addition to the spinal cord, there seemed to be a huge crystal resembling a magic crystal in the huge head of the giant beast. And among these ten million demons, some of the most powerful ones are for it.

Only a powerful demon can inflict a little damage on this crystal. The goal of the demon seems to be to break it up and take out what is hidden inside. Because this crystal is too big, Mu Feng can't see what is in it.

Of course, while slowly destroying it, the fallen crystal fragments also had a role and were collected by the demons.

It seems that there should be something here that the demon lords want so much. Now that Mu Feng saw this qiē, he naturally wanted to take it into his pocket. As for what this huge monster is, it may be that only the original god of the four elements can tell Mu Feng the reason.

And the god and demon compass carried by the god of the four elements is not in Mu Feng's hands now, but in Teresa's hand. And Teresa temporarily returned to the elven main city of Azhara with half of the elven army because of the invasion of the main city of Lionheart, the main city of the human race, to calm the situation. It seems that it will take some time to get the origin of this giant beast from the four elemental gods.

But it doesn't matter, Mu Feng can wait, as long as he occupies this place, or takes the giant beast skeleton away.

Finally, the Army arrived. Originally, Mu Feng planned to directly let the modern army in the army use special missiles (bombs) to drill holes downward, open up a large number of holes, and then bomb continuously to directly collapse this space.

In this way, the army can save a lot of trouble if it attacks again, but now that Mu Feng wants to protect this precious giant beast bone, he naturally can't use such a barbaric method.

Mu Feng left from here with the army, and changed places to enter from the entrance where he had entered the underground world before, intending to fight hard.

Qin Shuang, who came with Mu Feng, after knowing the mysterious giant beast skeleton from Mu Feng's mouth, also asked Mu Feng to take her in to take a look, and also recognized Mu Feng's idea. Since the Demon Legion racked their brains and spent so much money to get something, it must be good things, and they must be taken away, and they can't be cheapened.

As for the people who handed it over to the Skyrim Continent? Mu Feng, who was already ready to bring back to Earth in the Flying Castle, hadn't thought about it that way. Although he came to the Skyrim Continent to help fight the war, it was also to eliminate the threat of the demon army, not to help completely selflessly. It's better to keep such a good thing for yourself. At most, Teresa knows, and give her a little.

In Mu Feng's heart, Teresa is certainly not an outsider......

This huge network of underground passages is simply prepared for large-scale demon movement, so even if the war weapon is driven in, there is no problem. It was a huge cavity thirty or forty meters high. Spacious enough.

The rumbling sound quickly attracted the attention of the demons inside, and they were warlike by nature, and when they saw the uninvited guest, of course, they immediately launched an attack.

Such a battle doesn't need Mu Feng's help, and the soldiers of the coalition army can already solve it on their own. The demons that rushed up were all killed halfway by modern weapons.

However, when more demons rushed over, because the passage was still a little narrower, it was impossible to completely spread out the formation, allowing some demons to rush up. A real fierce battle began between the two sides.

But fortunately, the demons are not strong, and the casualties of the soldiers are completely acceptable.

Mu Feng and Qin Shuang rushed in first, wanting to prevent the demon in charge here from making any small moves.

Sure enough, the demon in charge here saw that the coalition army was attacking, and he wanted to destroy the large number of giant beast bone marrow that had been mined and had not had time to transport away, as well as the mysterious crystal powder.

But now that Mu Feng and Qin Shuang are here, naturally they won't let it get their wish. Mu Feng kicked it away from those storage devices and fell into the magma.

This demon in charge is also a legendary-level demon, but it may be smaller to adapt to underground life, and it is not as big as the average legendary boss.

But such a legendary boss was directly kicked away by Mu Feng, and there was still some embarrassment......

Angry, it rushed out of the magma directly, wanting to fight Mu Feng again.

Mu Feng himself is a fifth-order advanced by a fire-type ability, and this underground lava environment is like home to him, and he is not afraid at all, and he is really on the continent with it.

Qin Shuang could only shake her head, use the space package, and quickly include all the good things she could see. When Mu Feng solves the other party, he can go to the mysterious crystal and see how to take this big guy away.