In Gou Zhu's eyes, this pure yang array wall was not invisible, but a dense net woven by the neat pale red spiritual threads and warp and weft. All the spirit lines are drawn from the formation pattern on the tower, and finally included in the formation pattern on the tower.

In addition to the formation pattern on the Thorn Sky Tower, there are four arrays on each floor holding a formation pivot to sit on one side, and they can affect part of the spiritual machine line at any time. It's just that at this time, except for the topmost array that unfolded the Pure Yang Array Wall, everyone else's array was idle.

When Gou Zhu saw this situation for the first time, he thought that something had gone wrong with Ji Yan, an old madman, and he wanted to commit suicide.

After the countless red-haired baboons were blocked, they frantically attacked the Pure Yang Array Wall with their minions. These hard spiritual lines implicated the formations on the tower, and each attack caused the sparks on these formations to scatter.

After the red-haired baboons in front were blocked, the ones behind continued to climb up the stacks of their kind, and in a short time they were piled up like a baboon wall. They continued to attack the Pure Yang Array Wall violently, and the entire tower body kept shaking.

These baboons all have extremely sharp claws, violently tearing at the walls of the Pure Yang Array, constantly tearing out one breach after another.

Although the Pure Yang Array Wall can be continuously repaired by the Piercing Heaven Tower absorbing the pure Yang aura of heaven and earth, the repair speed is always limited. Under such a fierce attack, if there were more demon baboons surging from behind, it was very likely that this wall would not be able to withstand it.

Gou Zhu secretly thought, is this old man Ji Yan crazy? The Thorn Heaven Tower can obviously spread many layers of defense walls, but he actually only opens one layer? At this moment, he almost turned around and went straight to the passage under the Thorn Sky Tower to the city.

At this time, Ji Yanmian, who was sitting on the top of the tower, ordered without changing his color: "The eighth floor, open!"

After the four arrays sitting on the eighth layer received the order, they immediately injected their divine thoughts into the array hub. At the same time, the mystical lines drawn on the walls of the eighth floor of the tower shook like sparkling waves, glowing with colorful brilliance.

Pale red vertical and horizontal spiritual threads shot out from the tower's body, and countless invisible hands seemed to be threading needles and threads, and in an instant, they were woven into an impenetrable net.

The newly formed Pure Yang Formation Wall on this side was larger than the original one-layer area, which also separated the demon baboon vanguard troops who rushed to the front and fiercely attacked the innermost layer of the formation wall from the reinforcements behind. In this way, the strength of the attack received by the innermost layer has finally stabilized and no longer increases.

At the same time, the baboons began to stack on top of each other on a new layer of walls, and began to attack this new layer of walls.

In this way, one layer, two layers, three layers, a circle of protection, from the inside to the outside, continue to unfold. After half an hour, it unfolded into nine floors.

At the same time, the nine-layer protection also sealed a large number of red-haired baboons, and there may be thousands of them in a circle. The targets of so many baboons were scattered across the nine layers of different walls.

The entire body of the tower was subjected to violent impacts, and the aura was shaking. However, because the force is evenly distributed, this attack can withstand for some time.

At the same time, although Gou Zhu couldn't see the inside of the tower, he could clearly feel that some kind of powerful spiritual machine in the tower was accumulating, like a huge bowstring that was gradually tightening.

This accumulation has been going on since the end of the previous wave, but it has not yet reached its full potential. The process of charging is not related to the deployment of the nine layers of protection. But Ji Yan sat on the main seat of the formation alone, calmly controlling everything.

He had to make sure that the time for all nine layers of defense to be deployed was about the same as the time it took for the Sky Piercing Tower's spiritual power to be renewed, and that no layer of the Pure Yang Array Wall would be breached by the demon baboon.

From the outside, the entire Thorn Sky Tower is surrounded by red-haired baboons piled up in nine circles, which is magnificent, like a huge and incomparably large Beijing Temple. All the formations on the walls of the tower were already bright to the limit, and the walls of the tower had become hot, as if they might burn at any moment.

At this moment, there seemed to be a "bang" from inside the heart of the tower. An extremely load-bearing object in the tower seemed to have been suspended to the highest point, embedded in a groove somewhere.

The mechanism inside this tower is completely enclosed, and Gou Zhu has never seen its internal structure. But the formation master Ji Yan sat on the top of the tower and controlled all this. The bowstring had been tightened, and the Tower's defensive array had reached its limit. Without hesitation, he moved his mind and injected a wisp of divine thought into the array.

Suddenly there was a click from the depths of the tower, followed by a series of muffled sounds. Everyone's guard on the tower could feel that there was an incomparably heavy giant in the middle of the tower falling from a high place and smashing on the base of the tower, making a heavy and muffled sound.

At the same time as this muffled sound, Gou Zhu felt that the air around his body was squeezed and twisted, and at this moment, not only could he not breathe, but even his heartbeat seemed to be squeezed to a halt.

A strange shock wave appeared directly in the surrounding area. As far as the naked eye could see, the ground around the Sky Piercing Tower was like a circle of obvious ripples like the surface of the water.

The power of the waves rippled out from this circle of ripples, but it was not obvious when it reached the tower. Because this power surged from all directions, and when it reached the Thorn Tower in the middle, it canceled each other out, but there was not much power left. Gou Zhu felt the air constrict, the blood in his body surged, and the heart in his chest throbbed twice.

But the surroundings were different, and the waves spread out like ripples, and the ground shook with the countless baboons above.

The sturdy Pure Yang Array could block all foreign objects, but it had no defense against such shocks. Not only that, but the Nine Circles of Pure Yang Array Wall also vibrated together, concentrating the power to the point of terror like a nine-circle trumpet.

This shaking did not have much impact on the land and dense forests. However, the power on the blood and organs in the animal's body is huge, and the violent vibration can directly blast the heart and blood vessels, and shake the brain into mud.

In the blink of an eye, all the red-haired baboons within a mile of the Sky Piercing Tower were dead, rolling down like a pile of fruit collapsing, piling up all over the ground.

The shock wave continued to propagate outward, and the circle quickly expanded to a distance of tens of miles. But the farther away you are, the less powerful it is. The baboons that were affected outside the wall did not die, but only fainted temporarily, and soon woke up and gradually recovered.

At that moment, there was a creaking sound from the nearby city wall, and behind the tall bamboo fences, several wide bamboo plank bridges were lowered. The stubble people, who had already prepared in the city, rushed out with wooden carts, loaded with the carcasses of the red-haired baboons, and transported them back to the city.

They had half an hour to carry it. Half an hour later, the beast tide will arrive again, the gates will be closed, and the blood refiners who have not had time to enter the city will be mercilessly locked outside the city to become food for baboons. At this time, the Sky Thorn Tower will also start charging again, until the encirclement of the beast tide reaches its peak, and the Sky Thorn Tower's defense withstand reaches the limit.

After a busy day, when the afterglow of the setting sun was sprinkled on the deep gorge of the moat, the patriarch of the Cangjiao tribe, Muge, made a final round of inspection beside the Thorn Sky Tower. He heard a long trumpet, and decisively ordered all the people who were still busy to abandon the wooden carts in their hands and rush into the city.

The drawbridge was retracted, and the beast tide rushed in, but most of them rushed in the direction of the Sky Thorn Tower, and there were not many baboons who actually tried to jump over the moat's attack fence. Most of them rushed to the edge of the canyon to watch for a while, except for a few cars that couldn't stop and fell into the deep ravine, the others all grinned and howled at the opposite bank and left, heading in the direction of the Sky Piercing Tower.

On the side of the city where the drawbridge is stowed, the stalks are racing against time to skin and remove the bones of the piles of red-haired baboon corpses, remove the dirty internal organs, put the clean flesh in wooden barrels, and continuously pour them into the three bronze tripods in the way of manual handling.

This step has to be fast. After the death of the demon beast, the body is rotting all the time, and the fresher the flesh and blood, the purer the refined blood spirit stone. If those filthy internal organs, as well as bones that cannot refine blood spirit stones, are mixed into it, it will cause the entire pot of blood spirit stones to be mixed with impurities, and the quality will be greatly reduced, and there is even the possibility that the whole pot will be scrapped.

Others, on the other hand, are constantly grinding some mineral and plant raw materials into powders, precisely proportioned into so-called "excipients". These excipients must be configured on-site and used immediately, otherwise their efficacy will be lost. Each blood refining tribe has a unique auxiliary material formula, and the blood spirit stones refined are different in their own characteristics.

Next to the three big tripods, they have already built a high platform and lifting pulleys. The pulley rotated non-stop, constantly transporting barrels of flesh and blood to the high platform and dumping them into the bronze tripod. A refiner directs the young man, throwing in a variety of different accessories with precision and step-by-step. A strange fragrance wafted from the ding.

After boiling for about an hour, under the command of the refiner, everyone pulled the pulley and lever mechanism to tilt the giant tripod carefully.

A liquid with a strange fragrance, bright and translucent with a red glow, red as agate and viscous as honey, was poured out and poured into the molds of many squares that had been prepared below.

After another quarter of an hour, the heat dissipated. If you hook here, you have to stare your eyes out of your sockets. I saw that they dumped the mold, and there was a burst of pearl and jade sounds, and pieces of transparent and crystalline red blood spirit stones the size of dominoes fell out like raindrops.