Black Silk came to the front of the tower gate, and a powerful aura rushed straight to Blood Jiuyou and the others.

This aura is also very pure, much purer than the ordinary aura of heaven and earth.

"Is this an aura?" Blood Nine was stunned and muttered.

Blood Jiuyou laughed and said, "Haha! I see, I didn't expect the town tower to have such a function, it really deserves to be an innate spirit treasure." ”

After waiting here for an hour, Blood Nine Shadows finally figured out what was going on.

Every half an hour in the town tower, these black threads will appear, and the black threads will automatically absorb the mana of the prisoners, and then transform into pure spiritual power and spit out to the outside world.

Each layer has black silk, but the power is different, the higher the black silk is, the more powerful it is, the last layer can be called terrifying, and only those who are above the saints can withstand the plundering of the black silk, if the average person puts it in, he can suck it dry at one time.

Blood Jiuyou was thinking, if there were more people detained in the future, wouldn't the spiritual power of Heixuan Mountain be condensed, and at that time, the cultivation speed of the people in the Demon Palace would not increase exponentially.

Blood Nine You was excited when he thought about it, even if he had poor talent, he would be able to cultivate into an immortal.

The current world is not as good as before the gods, there was still innate aura at that time, and now the acquired aura is becoming scarcer and rarer, I'm afraid there will be no aura in the future.

This ability of the town tower has given the Demon Palace the foundation to win the top power.

Now the main thing is not to let the aura leak out, otherwise no amount of aura will be useless.

Blood Jiuyou knew the function of the town tower, but after thinking about how to prevent the aura from leaking out, he didn't come up with a suitable way after thinking about it.

The black bear spirit and the fire demon, who were still afraid, were brought out by the blood nine shadows, and both of them lost two layers of mana, and if they continued like this, they would be sucked dry.

Blood Jiuyou didn't want the two of them to die now, so he got them out first, sealed Xiu Wei and kept the dragon demon in other places.

When the two of them saw that they had come out, they both looked scared, and when they were taken away, they shouted loudly: "Thank you to the Nine Demon Lords, thank you to the Demon Lord......"

This time it scared the two out, and it was the first time they had encountered such a situation.

The dragon demon looked at the two of them proudly, and said: "This is our demon lord's magic weapon, it's amazing! If you dare to be dishonest, you don't need me to clean you up, when the demon lord is throwing you into the town tower, I don't know if you can still be as lucky as this time." ”

The Black Bear Spirit, the Flame Demon and the two said in unison: "Don't dare, don't dare the Demon Lord has great powers, how dare we not be honest, we will definitely be honest, let us do whatever we want, we will do it, there is no second word." ”

The dragon demon said coldly: "It's good to know each other, otherwise you will suffer." ”

The two black bear spirits had bitter faces, and they didn't know whether to laugh at the fact that they didn't die this time, or whether they should cry into the hands of Blood Jiuyou.

Blood Jiuyou returned to the Demon Hall alone, and after a while, he left the Demon Hall again and went to the formation tower.

Blood Nine thought about it, and the only thing that could keep the aura from leaking out was the formation and sealing technique.

Not to mention the sealing technique, the Blood Nine Shadows will not be at all, now it is only a formation.

After Xuejiuyou came to the formation tower, he went in to take a look, and found that the shelves inside were full of formations, one in a month, and more than 500 years were more than 5,000 formation books.

More than 5,000 Blood Nine Shadows were also drunk, and he was still embarrassed about this matter just now, and now in so many Xie Formations, he didn't believe that there was nothing he wanted.

Blood Jiuyou checked it with the power of the primordial gods, the speed was very fast, and he had already read as many as a thousand books in the blink of an eye, but there were not as many as he wanted, all of them were some basic formations, and there were a few low-level formations.

A quarter of an hour later, Blood Jiu You checked all the formations, but he was disappointed, there was nothing he wanted in the more than five thousand formation books.

However, there are a few good high-level formations, all of which are quite powerful, but unfortunately they are not the formations of the Blood Nine Shadows.

There are a total of more than 5,100 formation books in the formation tower, 4,000 are basic formation books, 800 low-level formation books, 2300 intermediate formation books, and 5 high-level formation books.

The five advanced formations are, the Golden Tiger Formation, the Wood Dragon Formation, the Ahuizotl Formation, the Fire Crane Formation, and the Earth Turtle Formation.

These five formations are the Five Elements Evil Array, and if they are fused together, they can form a top-level formation, the Five Elements Heavenly Evil Array.

The power of the Five Elements Heavenly Demon Great Array is much more powerful than that of the Eight Desolations Flame Fire and Ice Array, but it requires too many people, and the cultivation cannot be lower than that of Taiyi True Immortal, otherwise it will not be able to control the formation banner of the Great Array.

If a single formation, these five formations, that one is not as powerful as the Eight Desolation Flame and Fire Cold Ice Array, the separated Five Elements Heavenly Demon Great Array is the bottom existence in the advanced formation, and the Eight Desolation Fire and Cold Ice Formation is a top-notch existence in the advanced formation.

Although he didn't find a suitable formation, the Five Elements Heavenly Demon Great Array gave the Blood Nine Shadows a surprise, and with the top-level Great Array, the strength of the Demon Palace has risen a lot.

Blood Nine Shadows was holding the Five Elements Heavenly Demon Great Array, and when he was preparing to be powerful, suddenly a formation appeared in the void.

It turns out that today is the day when the formation tower evolves again, although the blood nine shadows don't have any hope for this formation book, but it's not wrong to take a look, what if it's a special formation!

The formation book flew into the hands of Blood Jiuyou, and suddenly Blood Jiuyou's face changed greatly, followed by a look of surprise.

The Two Realms Array, a formation integrating defense, illusion, attack and killing, and sealing, the main thing is the seal.

The Two Realms Array is exactly the formation that the Blood Nine Shadows want most now, and the Two Realms Array can not only prevent the leakage of spiritual energy, but also protect the mountain.

The Two Realms Array is a top-level formation, and it is also among the best in the top-level formation, because it has the ability to split the void.

After the two realms array is laid down, the inside and the outside are like two worlds, if the big array is spread in the Black Xuan Mountain, if you look at it from the outside, the Black Xuan Mountain will not disappear, it can be said to be a world of its own.

Blood Jiuyou happily took the six formation books out of the formation building, and as soon as they came out, the formation books disappeared, and turned into array flags and array disks.

Blood Jiuyou put these things away, and when he had studied the big array thoroughly, he began to arrange the big array.

The Two Realms Array is a top-level array, only one level lower than the god-level array, if you don't understand it, how to arrange the big array, it's not fun to make a mess when the time comes.

Blood Nine Shadows returned to the Demon Hall and began to study how to use these two formations.

......

White Bone Mountain

A little demon was thinking about the White Bone Lady's report, "Madam, that Tang Seng has already entered the realm of my White Bone Mountain, and I ask Madam to tell me how to do it." ”

Lady Bones opened her eyes, and a cold light flashed. So he said: "You are optimistic about the family, I will go and see if it is Tang Seng, don't make a mistake and leak the news, let the monk know, it's not good." ”

"Yes, madam, the little ones must be optimistic about the home. The little demons said in unison.

The little demons then went down.

After pondering for a while, Lady Bones' eyes flashed, and she had a countermeasure in her heart, and then her figure suddenly disappeared into the White Bone Cave.