After hearing Dao Lao's explanation, Biscuit Tang carefully picked up the token, furrowing his brow as he said, "Although our proficiency in dark magic is limited, this token itself possesses formidable control over zombie soldiers. So, I think we can give it a try. However, we cannot guarantee how long the control exerted by us through this token on the zombie soldiers will last. After all, only those proficient in dark magic can fully unleash the power of this token."

Dao Lao patted Biscuit Tang's shoulder heavily, saying, "I believe in your abilities. Regardless of how long we can control this group of zombies, as long as we can create enough chaos here and buy enough time for everyone, that will be enough!"

Biscuit Tang nodded solemnly, then looked at the two elves disguised as zombie soldiers. After receiving confirmation from the two elves, the three of them immediately climbed onto the giant beast corpse acting as cover.

Then, holding the token shrouded in black mist together, they raised it high and shouted in unison, "Under Archbishop Anselin's command, with the primitive necromancy control token in hand! All zombies present, obey my command! Remove all control spells on you, and now only follow my orders! Soldiers, split into three groups! One group, attack Blackstone Castle! One group, standby! One group, seize the streets outside the stone gate! Any who dare to obstruct, kill mercilessly!"

Sure enough, under the joint spellcasting of Biscuit Tang and the others, every zombie soldier in Blackstone Square who could hear their shouts immediately ceased their actions and looked towards the three standing on the giant corpse. After seeing their control taking effect, Biscuit Tang and the others immediately repeated the incantation three times to ensure that all the zombie soldiers present received their instructions.

After the continuous chanting of spells by Biscuit Tang and the others, Haoyun saw that the zombie soldiers present immediately split into three groups according to Biscuit Tang and the others' instructions, and began to act separately. Biscuit Tang and the others then jumped down from the beast's body, still holding the token, and ran around the circular Blackstone Square. They ran while loudly chanting spells, allowing more guards stationed farther away and even more flying beasts hovering above to hear their spells.

Blackstone Castle occupied a vast area. Therefore, under Biscuit Tang and the others' spellcasting while running, they circled around Blackstone Square for over a minute before collapsing from exhaustion. Plus, controlling the original token seemed to consume a considerable amount of their energy. As a result, after returning to the starting point, Biscuit Tang and the others immediately experienced exhaustion and even shock.

Seeing this, Haoyun didn't hesitate and immediately took out three bottles of purified water from Ha Ha Le brand for them to drink. After all, it was an emergency involving lives, so Dao Lao didn't stop Haoyun's actions. However, after seeing Haoyun's actions, he couldn't help but complain in the private chat channel, saying that after this mission was over, he would have to add another special explanation to the report he would give to his superiors.

As for why Biscuit Tang and the others did this? It was because, aside from the zombie soldiers brought here by Haoyun, all the guards stationed in Blackstone Square were also zombie soldiers. Therefore, after Biscuit Tang and the others sent out the original necromancy control token, these guards naturally fell under their control as well.

As a result, Haoyun and the others not only gained control over more zombie soldiers, but also, with the addition of the high-ranking zombie soldiers belonging to the guards, greatly bolstered the strength of their zombie army. Consequently, facing such a large group of powerful zombie soldiers, the Dark Elf soldiers besieged outside the breached stone gate were about to experience a calamity. As for the group of zombie soldiers charging directly into Blackstone Castle, they would undoubtedly cause chaos within the castle.

The nights on the planet of Elves were already longer than those on Earth, coupled with the chaotic and gloomy weather in the territory of the Dark Elves, and the continuous tense battles tonight, made Haoyun feel that tonight was unimaginably long.

Because Biscuit Tang and the others clearly stated in the spells they cast just now, instructing the zombie soldiers to indiscriminately slaughter anyone who tried to hinder their goals. Therefore, Biscuit Tang and his group, who didn't even bring weapons this time, naturally didn't pose any threat to the zombie soldiers and were completely ignored by them. So, after Biscuit Tang and the others recovered their energy, they immediately followed the massive horde of zombie soldiers surging towards the streets of Cold Moon City and calmly returned to the logistics area.

Even though the zombie riot that had just occurred didn't happen, just seeing a group of zombie soldiers suddenly rushing towards them with teeth and claws on the midnight streets was enough to immediately stop the guards of Cold Moon City from counterattacking. Moreover, what they saw now was a mixed group of ordinary zombie soldiers, large zombie beasts, and guards from Blackstone Castle, which made the Dark Elf soldiers hesitate to attack the zombies at first sight.

And these Dark Elf soldiers naturally fell into the hands of Biscuit Tang and his group. Immediately, they fought fiercely with the zombie soldiers. Plus, these Dark Elf soldiers only just found out that the guards stationed at Blackstone Castle were all high-ranking zombie soldiers. This made the Dark Elf soldiers, who already held the guards in awe, even more afraid of the heavily armed guards mercilessly swinging their weapons at them. As a result, the defenders of Cold Moon City soon found themselves routed due to both inferior strength and psychological disadvantage.

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All of this naturally worked greatly in favor of Biscuit Tang and his group. Because of the chaos among the defenders of Cold Moon City at this time, everyone's attention was focused on the out-of-control zombies. So, they took this opportunity to change into another set of disguises, smoothly leaving the logistics area. Then, they successfully mingled among the Dark Elf soldiers who were temporarily leaving Cold Moon City to avoid the danger posed by the out-of-control zombie soldiers, and left the jurisdiction of Cold Moon City overnight.

On the other side, Haoyun and Dao Lao also changed their attire. However, unlike the others, they disguised themselves as two Blackstone Castle guards wearing fully enclosed metal masks to better blend in with the zombie soldiers storming into the castle.

Of course, once Haoyun and Dao Lao put on the masks, they couldn't see the road ahead. But with the assistance of their Mold Spirit Energy Pursuit System, even though they couldn't see anything, they could still clearly perceive their surroundings in their consciousness.

Moreover, because Haoyun and Dao Lao were unarmed at the moment, the zombie soldiers under the control of the token didn't attack them, as they posed no threat. Furthermore, upon entering Blackstone Castle, since they didn't attack the guards rushing out from inside the castle armed with weapons, they were regarded as allies by these normal guards. Thus, Haoyun and Dao Lao, ignored by both sides, strolled into Blackstone Castle.

The interior of Blackstone Castle was similar to the Zombie Maintenance Center, with an extremely rough and simple unfinished style. However, the grandiose and majestic atmosphere was somewhat compensated for by the tens of meters high conical hollow design extending from the center of the castle's first-floor hall to the top.

Since no one paid attention to Haoyun and Dao Lao, they easily avoided the crowds fighting in the hall and slipped into the second arched doorway on the left side of the hall. Inside the archway was a dimly lit arched corridor, with several rooms on either side. The arches leading into these rooms were not aligned, giving the corridor's layout a somewhat awkward appearance.

Haoyun and Dao Lao didn't have time to ponder why the rooms here were laid out in such an awkward asymmetrical manner. Because they didn't know how long the spells cast by Biscuit Tang would control the zombie soldiers outside? Nor did they know what state those zombie soldiers would be in after their control spells expired?

So, based on the information provided by Biscuit Tang, Haoyun and Dao Lao immediately headed towards the depths of the corridor and soon arrived at the eighth archway on the left side. After confirming that the decorative pattern of rhombuses and runes above this doorway was identical to the sketch drawn by Biscuit Tang, they entered the archway after confirming that the entire corridor was empty and all guards had gone to support the battle in the hall.

Upon entering the archway, Haoyun and Dao Lao saw a spacious stairwell. At the same time, they quickly noticed that this staircase only led to the underground, while the part leading upstairs had been completely blocked by a wall erected later.

The stairwell was unremarkable, but there were two fully armed guards standing there. Perhaps because Haoyun and Dao Lao were also wearing guard armor, these two guards didn't show any hostility when they saw them. However, judging from the gestures of the guards, they seemed to be indicating that Haoyun and Dao Lao should leave quickly, as this area was restricted.

Haoyun and Dao Lao naturally wouldn't leave, as their purpose in entering Blackstone Castle was to explore the possible secrets hidden here. Moreover, even though enemies had breached Blackstone Castle, the guards inside the castle were still holding their positions in the stairwell, despite all the guards rushing to support the battle in the hall. Didn't this indicate that there might be something unusual in this underground? If so, Haoyun and Dao Lao had to explore the basement below.

So, without hesitation, they killed the two guards and quickly charged down the stairs. Since the previous three floors leading to the underground were all completely blocked by stone walls, and in order to quickly deal with these guards, Haoyun and Dao Lao exerted a hundred percent of their strength. Therefore, in the blink of an eye, they cleaned up all the guards guarding the passage to the fourth underground level.

Haoyun and Dao Lao soon reached the entrance to the fourth underground level. Unlike upstairs, in addition to four guards guarding the stairwell, there were also two tightly closed black stone doors separating the staircase from the basement of this level. Without much talk, Haoyun and Dao Lao swiftly killed the four guards and then searched for a way to open the stone doors.

However, despite searching for a while near the hallway, they didn't find any device to open the stone doors. At the same time, they carefully searched the bodies of the guards upstairs but found no props resembling those used to open the stone doors. So, Haoyun and Dao Lao could only contact Biscuit Tang to see if he had seen similar doors in Blackstone Castle before and knew how to open them.

"Um, based on your description, it seems that this stone door is completely sealed," Biscuit Tang replied after hearing Haoyun's description.

"Completely sealed? Does that mean the stone door cannot be opened?" Haoyun asked anxiously.

"In theory, yes. Because, if your description is correct, this stone door should have been sealed by a seal similar to the one the elders of the Dark Magic Association used to seal Anselin. So, unless the seal on the stone door is removed with equally powerful dark magic, the stone door cannot be opened," Biscuit Tang replied.

"Of course, theoretically, if you have the strength to crush this seal of dark magic, even if you don't remove the seal on the stone door, you can still forcibly open it. It's just that, to have that kind of strength, it's not something an ordinary person possesses, so—" Biscuit Tang continued.

"Understood! Master Tang, you should focus on hiding your identity and quickly leave Cold Moon City. Leave the rest to us." Hearing Biscuit Tang's words, Dao Lao immediately interrupted.

When it came to unparalleled strength beyond the ordinary, Dao Lao naturally held the most authority. After all, he wasn't originally a being of the mortal realm but an esteemed divine priest from the celestial realm. Therefore, upon learning from Biscuit Tang that the stone door infused with dark magic could be forcefully opened with brute force, and that it wouldn't result in too many negative consequences, Dao Lao once again transformed his staff into a radiant weapon enveloped in holy energy.