Mu Yun's eyes became brighter and brighter. If the self-destruction worm rose to level seven, the power of one of them would rise sharply.

Some large caves only require a few seventh-level self-destructing insects to reach the level of dozens of them before. As long as you stay in the nearby rock layer when you are about to detonate, you can't stop the self-destructing demon even if you react.

After thinking for a while, Mu Yun finally made up this plan with a wave of his hand. He did not disturb Ying's breakthrough, but contacted the Zerg Heart and asked it to re-adjust the seventh-level insect eggs in the Zerg Hall.

If it is remade and incubated, it will take another month to waste. At that time, the strongest moment of Hell Projection arrives with the support that the demons may have reacted, and the variables are too great.

Because the seventh-level Zerg warrior has not yet taken shape, the Zerg heart can be adjusted at any time. Perhaps hatching will last for a few days, but it is much better than an extra month.

Of course, Mu Yun also refilled some new ones just in case the number is not enough. The previous twenty ones, Mu Yun had refilled fifty ones, which was barely satisfied only when he came to hunt demons these days. Moreover, it was also the production of the Zerg Heart that is close to its limit. If there are more, there will be no need to upgrade to other troops.

If the backup self-explosion worm is tight, it can also use the source of Zerg Heart and excess energy to accelerate cultivation and hatching. Doing so will hurt Zerg Heart, so this will only be done if you have to.

With the seventh-level self-destruction worms, Mu Yun will be much more at ease when allocating them. The largest ones rely on the seventh-level self-destruction worms to solve them, while the second ones can be detonated by the seventh-level team. It is not difficult to allocate more than 30 mines in this way.

To prepare at least 5,000 self-destructive insects, it is not enough to rely on current storage alone, and it also needs to provide support to the coalition forces. The pressure of relying on the heart of a seventh-level Zerg is also very high.

But even the shadow has no choice. The advancement speed of Zerg's Heart is extremely fast, but after breaking through the higher level, the speed slows down. If you want to continue to advance, you need a large amount of resources.

If it weren't for the connection between the exile land and the demon's abyss, absorbing the demon's body here and the demon's soul there, the advancement speed of the Zerg Heart would undoubtedly be faster. By then, a powerful Zerg legion would be enough to crush everything.

Thinking of this, Mu Yun couldn't help but clench his fists. Perhaps this was Ying Zhen's idea. If there was such a powerful Zerg army, and if it was promoted to the ninth level, then even if the coalition forces did not need to be needed, it would be able to withstand this level of demon attack.

At that time, it will undoubtedly be much more relaxed to consider detonating the energy crystal cluster and breaking the two continents. Now, in order to allow Mu Yun to leave in a short time, Ying gave up the safe approach and chose to take a gamble. Even if it succeeds, the time it takes to upgrade the Zerg Heart will definitely become longer, not to mention the variables.

This is all for him!

For a moment, Mu Yun wanted to give up the idea of ​​going out this time and wait for the steady development before going out, because even if Sereya was baptized, she might not be used to surrender to God in a short time, and she could still survive.

But the next moment Mu Yun got rid of this idea. He didn't want to gamble on unknown situations. If Sereya died, he would definitely regret it for the rest of his life.

And the losses of the sacrifice of the side shadow are still possible to make up for.

After making the decision, Mu Yun did not hesitate anymore. While instructing the Zerg Heart in the soul link to adjust the priority of hatching, he began to explore the entire Demon Fortress.

Exploring the location of the energy crystal cluster in advance is only one of the tasks, the other is to find out where Qier Lace is and to check whether there will be support from other eighth-level demons.

Mu Yun's escape is not invincible. Although it is in the spiritual world, even if the eighth-level strong man is not suitable for entering the spiritual world, he will have the means to explore and attack the spiritual world. If Mu Yun gets too close, there is still a risk of being discovered.

Just like in the dark, people wearing black cloaks are difficult to detect, but once they move or get close, there is still a possibility of being discovered by people with keen hearing.

Of course, if Mu Yun breaks through to the eighth level, the discovered possibility may continue to decrease.

Only after exploring the crystal cluster did Mu Yun have the leisure to appreciate this huge demon fortress.

According to Mu Yun's estimate, the area of ​​this demon fortress is at least the size of the Bonia Royal City, and it may be even larger. It is not an exaggeration to say that it is a fortress city.

Thinking back to the first level when I entered the secret realm of the undead, I was so brave that I went straight through the gully and reached the fortress of a ninth level lich without dying. That luck was really good enough.

This is also their first-level, and the ninth-level lichs are disdainful to send large troops to attack. They only have to fight their best to withstand the third-level ghosts. Anyone who sends a fifth-level, they will have to be buried in that secret realm.

I don’t know what’s going on around the secret realm now, Mu Yun couldn’t help but think.

There must be many secrets hidden there. Even if Mu Yun is now at the seventh level, he would not dare to enter the lich's fortress rashly. You should know that the area of ​​that fortress is not smaller than that of this demon fortress.

The first thing Mu Yun found was the portal that could go back to the mainland. They were located deep underground in the fortress, but compared to the crystal cluster mine cave, it was much shallower, only a few hundred meters above the ground.

This is a very spacious hall, and it looks like an underground square.

However, there are not many demons in this square now. Except for regular patrols, the rest are basically going to fight on the ground.

In the hall square, every distance, a demon-exclusive teleportation array is carved on the ground, with hundreds of them. As long as it is activated, it can be teleported to the place where it goes through the magic array.

At the center of the square, there is a huge magic array, which looks like the pattern in the center of the square. I haven't seen a demon open this magic array for so many years, and I don't know where it was teleported.

The surrounding magic arrays are all fixed-point magic arrays, most of which are teleported to the main plane, while the rest are teleported to the secondary plane.

Since it is a transmission between two planes, the cost of transmission is huge, but if it is opened from the main plane by sacrifice, it is much easier to connect.

Therefore, these teleportation arrays are also called sacrifice arrays. The sacrifice that Mu Yun encountered outside Mes Town a few years ago was similar.

If you want to leave here, in addition to waiting for the sacrifice of the main plane, you can also travel through the spiritual world. The powerful demon can also tear open the space and try to enter the main plane through the channel. However, doing so will weaken your own strength when entering the main plane.

Otherwise, there will be only one day when the interplanetary barriers caused by void tides will be weakened once a year, and it will also be called the Holy War Day by the human coalition.

This time will last about a month, and you can open the teleportation channel here through sacrifice. It is a fixed program for the demons to attack the continent.

Of course, doing this does not guarantee certain safety, but it is also a rare opportunity to leave here.
Chapter completed!