[Ding!]

[Congratulations, host, for obtaining one Defense-type Crystal!]

[Congratulations, host, for triggering a hundred times critical hit and obtaining a hundred Defense-type Crystals!]

[Ding!]

[Congratulations, host, for obtaining one Metal-type Crystal!]

[Congratulations, host, for triggering a hundred times critical hit and obtaining a hundred Metal-type Crystals!]

Listening to the system's voice, David's brow slightly furrowed. "Metal-type Crystal?" Obtaining Defense-type Crystals was within his expectations since the defense of this family of three was already above that of ordinary zombies. However, the Metal-type Crystal surprised David a bit. It was the first time he obtained a crystal from the Five Elements series.

"What is the use of the Metal-type Crystal?" David recalled that Duane awakened an ability related to the Metal element, so he asked the system in his mind.

[Answer to the host!]

"The Metal-type Crystal is an evolved version of the Defense-type Crystal, which can upgrade the host's physical defense and the base's defenses."

After the system explained, David nodded inwardly. In simple terms, the Metal-type Crystal was a higher-level crystal compared to the Defense-type Crystal, and its function was to provide defense for espers and bases.

This made David secretly delighted. With the Metal-type Crystal, not only would his physical defense become even stronger, but the defense of the base would also undergo a qualitative change. However, David didn't rush to use the Metal-type Crystal at this moment. He looked towards Fatso.

Fatso was currently coldly looking at the three corpses, his eyes full of disdain. "Now you know how powerful I am? Let me tell you, in your next life, if you see me, you better walk around me, or else you'll get a beating every time!"

David couldn't help but look at Fatso with a gaze as if he were looking at a big fool. If it weren't for him and Mandy, this guy probably would have fled in fear and wouldn't be so arrogant now.

"Fatso, go and call the others up. We're going to the fifth floor." David didn't put Mandy away but let her stand beside him as he told Fatso. With the Ghost Zombie's domain currently unbeatable, his own ability couldn't be used. Having Mandy with him would reduce a lot of trouble. However, David was also thinking about ways to break the Ghost Zombie's domain. Hearing David's command, Fatso nodded and spat contemptuously at the male corpse before heading down to the third floor.

" screwed! It's haunted!" As soon as Fatso arrived on the third floor, he heard his pig-like screams. historical

David's heart trembled, and he immediately directed Mandy to rush down. He also hurriedly arrived at the staircase on the third floor. In an instant, the scene appeared before his eyes: Fatso stood there dumbfounded, looking at the people in front of him with a bewildered expression.

David looked up and immediately frowned. He saw two identical Dukes. What was going on? David was momentarily stunned.

At this moment, Charles quickly walked up to David and said, "Two Dukes suddenly appeared, there must be a Ghost Zombie among them."

As he spoke, Charles once again examined the two people. They were arguing fiercely outside the apartment just a moment ago, so Charles had no choice but to bring them inside. The others also had puzzled expressions upon seeing the two Dukes approach.

"We've asked all sorts of questions, and they both can answer them immediately. It's hard to determine who's real and who's fake," Charles continued. They had asked various questions to the two Dukes in an attempt to figure out who the real Duke was, even asking about the name of the small shop where Duke had hidden before. However, both of them could answer immediately, leaving them at a loss, and they could only wait for David to come down.

Listening to Charles, David nodded and then looked at Fatso. Fatso's expression also became serious, continuously observing the two Dukes.

"David, I am the real one! Who is this guy?" one of the Dukes walked up to David anxiously and said.

"Nonsense! I am the real one! David, don't be fooled by this guy, he's the fake one!" the other Duke also hurriedly approached, pointing angrily at the other.

"Who are you, and why are you impersonating me!"

"Who are you, and why are you impersonating me!"

The two Dukes started arguing in front of David. The others frowned, unsure of which Duke to support. David rubbed his temples and shook his head slightly. Fatso approached David at this moment and smiled faintly.

"True or false Duke, this is a rare scene!" Fatso commented, leaning against the wall and watching the two. David sighed and looked at them again. He knew that one of the Dukes must be the Ghost Zombie transformed. He probably took the opportunity to possess Duke when he went out last night. David had noticed something was amiss from the beginning.

Duke had always been quiet in the team, rarely speaking even during their actions. Even if he got injured, he wouldn't make a sound. But today, on their way to the Youth Apartment, he was talking everywhere, even joking with Arnold. His behavior at that time raised suspicion in David's mind.

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Fatso did the same. He secretly held a small mirror in his hand, constantly observing Duke's every move through reflections. Finally, he handed the mirror to David, allowing David to keep a close eye on Duke's every action.

Fatso looked at David, knowing how David would handle this situation. At this point, David raised his head and looked at the two Dukes. Now he needed to determine which Duke was here just now. He sighed and said, "Shut up!"

Hearing David's words, both Dukes closed their mouths. However, they still glared at each other with immense anger.

"David, what should we do now?" Sally asked, approaching him. David smiled lightly at her, reassuring her.

"The most important thing now is to break this domain; otherwise, none of us can leave," David continued, looking at the two.

"And the secret to breaking the domain lies in the room where the skeleton appeared on the third floor. You two should go there quickly," David said, pulling out the alloy dagger from behind his back.

Fatso quietly approached the two Dukes, whistling playfully. Meanwhile, David gestured to Arnold and Charles. They immediately understood and put on a seemingly nonchalant expression, but their attention was all focused on the two Dukes.

Hearing David's words, one of the Dukes nodded and quickly ran towards the third floor. The other Duke stood there, looking confused.

"What third floor? What skeleton?"