Upon hearing this, a glimmer of hope flashed in the girl's eyes. She hesitated for a moment, but ultimately decided to believe Zhang Shi and his group. She stood up, wiped away her tears, and began to recount everything she knew in detail.

"The men in black robes are the elite among those invisible monsters. They appeared in the City of Mist before us. They call themselves servants of the gods and claim that everything they do in the City of Mist is guided by the gods. As for wearing black robes, as far as I know, it is to conceal their aura and block out the light."

Zhang Shi recalled the beam of light that pierced through the clouds, and suddenly it dawned on him that he had figured out the black-robed man's weakness.

"As for that beast, all I know is that it is attracted by sound and devours tangible things. Our tribe has listed it as a taboo in the city and acts with extreme caution, for fear of arousing this strange being."

As the girl spoke, a hint of fear crept into her voice, clearly indicating her deep apprehension towards the beast.

Zhang Shi frowned, pondering this information. He realized that to completely resolve Wu Qing's problem, he had to gain a deeper understanding of these invisible monsters and their underlying motives. The black-robed man and the earth beast were undoubtedly two key nodes in this clue.

"Do you know where Grandma is? She's our target for this trip," Zhao Feng interjected, his eyes fixed on the girl, as if afraid she was hiding something.

The girl shook her head, a look of confusion on her face: "Grandma... I don't know what you're talking about. There are indeed many mysterious beings in the City of Mist, but I don't recall anyone called Grandma."

Zhang Shi was not surprised. Since his mother-in-law was able to leave clues in the Fog City, she was obviously not an ordinary person, and it would not be easy to find her.

“It’s alright, go on. What other characteristics or habits do those men in black robes have?” Zhang Shi didn’t give up and continued to press for answers.

The girl thought for a moment and continued, "The people in black robes are very secretive. They usually only operate in the shadows and seem to be particularly sensitive to light. I once saw a person in black robes accidentally exposed to sunlight shining through the clouds during the day, and he instantly turned into a puddle of black water."

Upon hearing this, Zhang Shi's heart stirred. He secretly made a mental note of it and decided to use it in his future actions.

"Furthermore, there seems to be a strict hierarchy among the black-robed people. Those who wear ordinary black robes are usually deacons who carry out missions, while those who wear black robes with special insignia are beings of higher status. As for their leader, I have never seen him, but I have heard that he has the ability to control other invisible beings."

The girl's tone held a hint of awe as she spoke. Zhang Shi fell into deep thought. The leader of the black-robed men, the one controlling... this was undoubtedly a formidable enemy.

"Alright, thank you for your cooperation. You can stay here for a while, and we'll come back to pick you up after we've taken care of our own business." Zhang Shi looked at the girl with a hint of sincerity in his eyes.

The girl didn't hesitate for long and finally decided to trust Zhang Shi and his group. She understood that if she wanted to leave the cage of Fog City, she had to know how to make choices.

Zhang Shi nodded, signaling everyone to prepare to set off. They knew the road ahead would be even more difficult, but as long as they could find the old woman and resolve Wu Qing's problem, it would all be worth it.

After searching aimlessly in the city lord's mansion for a while, the group found no trace of the old woman. The impatient Zhao Feng was getting a little impatient and didn't understand why Zhang Shi was so insistent on clinging to the old woman's whereabouts.

Zhang Shi, of course, could not reveal that his true purpose was to solve Wu Qing's problem. He simply remained silent and searched house by house in the most clumsy way possible.

Suddenly, Zhang Shi's heart skipped a beat, and then the ring in his hand began to emit a blinding red light uncontrollably. The next second, a giant, three times the height of an inverted triangle, covered in a mud-like substance, "floated" out of the ground. This monster truly had three heads and six arms, with the two uppermost arms being two giant snakes. This reminded Zhang Shi of the similar mutated zombies he had seen during the zombie apocalypse, and he wondered if there was a connection between the two.

"ah!"

The monster let out a low roar, shaking off the mud to reveal its three true faces. Zhang Shi looked up and, as he expected, the head in the center was indeed Chen Beipan, who had been missing for a day; the one on the left was the mysterious old woman; only the head on the right was unfamiliar. Zhang Shi frowned deeply; the scene before him was undoubtedly the worst possible scenario.

Zhao Feng angrily swung his battle axe and charged forward.

"You shut the hell up! If you summon the earth beasts, I guarantee you'll be the first one to die!"

Zhang Shi tried to control Chen Beipan, but found that even though the two were face to face, the connection of the contract became extremely weak and had no effect at all.

The monster in front of them remained silent, waving its six arms as it engaged Zhao Feng in combat. It seemed to possess some intelligence, but no memory.

Zhang Shi gritted his teeth, picked up Lao Duan, and rushed forward. Since the situation was already beyond repair, they should first clear away the obstacles in their path.

However, as soon as they clashed, Zhang Shi realized that his opponent was no easy opponent. His opponent's speed and strength were astonishing, and despite his enormous size, his coordination was extremely strong. Zhao Feng was already being suppressed by his opponent.

Zhang Shi wielded the cleaver, each strike accompanied by a whooshing sound. He knew that facing such a three-headed, six-armed monster, he had to go all out. The cleaver drew silver trails in the air, sparks flying as it clashed with the monster's thick arms. With his agile movements, Zhang Shi nimbly moved around the monster, searching for openings.

Zhao Feng, meanwhile, was wielding his battle axe with tremendous force, confronting the monster head-on. However, the monster seemed undaunted, growing stronger with each battle. Its three heads emitted different roars, and its six arms moved with the agility of six venomous snakes, putting immense pressure on Zhao Feng.

Suddenly, the head belonging to Chen Beipan in the middle of the monster opened its mouth and let out a shrill scream. Then, as if driven by an invisible force, its speed increased dramatically, and its strength also increased. Zhang Shi's heart skipped a beat, realizing that this might be some kind of special skill or state that he had to break as soon as possible.

He leaped into the air, his cleaver tracing a perfect arc as it aimed straight for the monster's head. At the same time, Zhao Feng saw Zhang Shi's intention. He roared, his battle axe whistling through the air as it cleaved towards the same target from the other side.

"Bang!" The cleaver and the battle axe struck simultaneously, and the monster's head burst into a dazzling red light. Then, its entire body trembled violently, as if it had suffered a severe blow. However, at this critical moment, the monster's body suddenly shuddered and then vanished from in front of the two of them.

"This..." Zhang Shi and Zhao Feng were both stunned, looking around for each other.

Just then, a dark shadow swept past. Zhang Shi quickly used his Shadow Step to dodge, narrowly avoiding the attack. Looking back, Zhang Shi saw that the monster had appeared underground behind them at some point. It was now holding a pitch-black cane, the tip of which shimmered with an eerie blue light. It moved across the ground like water, heading straight for Zhang Shi.