Doomsday: with unlimited warehouse system

"Little black, attack!" Upon seeing David, who arrived just in time, giving the command, Little black charged towards the zombie. Its speed was so fast that it left behind afterimages. David, holding an alloy dagger, followed closely behind Little black with a serious expression.

"David?" Seeing that it was David who came, Monica was initially puzzled, but then she felt a sense of reassurance. Ever since David saved her last time, whenever she saw him, she felt a sense of safety. It seemed that as long as David was around, she didn't have to worry about anything.

At this moment, David quickly arrived by Monica's side and asked, "Are you okay?" Monica shook her head bitterly. She couldn't believe that in just two days, David had saved her twice in her most dangerous moments. This made her feel touched deep inside.

"As long as you're fine. Stay here and don't move," David nodded and said, then he picked up the alloy dagger, preparing to help Little black subdue the zombie.

"Wait, David!" Seeing this, Monica quickly stopped him. "What's wrong?" David paused and asked in confusion.

"This zombie is different from ordinary zombies, and its strength is even stronger than that of a high-level zombie. I suspect... it might be an intelligent zombie," Monica said with a frown, revealing her conjecture.

During the previous battle, Monica vaguely sensed the difference in this zombie. It not only possessed intelligence but also understood tactics and could adapt on the fly. This immediately reminded her of the descriptions she had read in the illustrations about intelligent zombies. Otherwise, with her current strength, although she couldn't kill a high-level zombie, she shouldn't have ended up in such a miserable state.

"An intelligent zombie?" Upon hearing Monica's words, David furrowed his brow instantly. He was well aware of the existence of intelligent zombies and their terrifying nature. The destruction of the previous world could be attributed to the sudden appearance of a large number of intelligent zombies, rendering countless survivors helpless and ultimately leading to their demise.

In fact, David had some doubts earlier. He knew that Monica's strength should not be underestimated, so how did she end up defeated by this zombie? Moreover, judging from her complexion, it seemed that she had already exhausted all her strength.

However, at that time, David didn't have time to think too much. He was focused on quickly dealing with this zombie, which made him overlook a careful observation of it. Therefore, he stopped his footsteps and stood aside, observing the battle between Little black and the zombie. Little black, who had grown into a commanding-level hellhound, naturally possessed formidable strength. Its hind legs pushed off the ground, leaping towards the zombie, while opening its mouth and shooting out a green flame at extreme speed.

However, the zombie, upon seeing this, directly rolled on the ground, skillfully dodging Little black's hellfire attack. Even while rolling, it took the opportunity to assess Little black's landing position. Just as Little black was about to touch the ground, the zombie suddenly rushed forward with astonishing speed, even surpassing Little black .

Before Little Black landed, it decisively threw a punch! The punch landed directly on Little Black's abdomen, forcefully sending it flying more than ten meters away! Little Black, hit by the blow, let out a muffled groan and crashed into the wall, shattering some bricks and stones.

"Little Black!" David's heart tightened, and he quickly ran towards Little Black. He saw Little Black lying on the ground, curling up its whole body, with a pained expression on its face. Obviously, the punch had caused significant injury.

Seeing Little Black, who had just grown to the level of a leader, losing its fighting ability with a single punch from the zombie, David became furious. In this world, there weren't many people or things that could accompany him. Arnold was one, Sally was one, and even Duke was one. But only Little Black and Cola were the best comfort in his heart. So now that Little Black was seriously injured, how could he sit idly by?

"You bastard! I'm going to kill you!" Instantly, a strong killing intent surged from David's body. He looked like a bloodthirsty demon coming out of hell, wielding an alloy short knife as he rushed towards the zombie. The zombie, on the other hand, stood still, watching David with a contemptuous smile. It seemed to be mocking how a mere human dared to fight against an intelligent zombie. Wasn't this seeking death?

But David didn't care about what the zombie was thinking. In his eyes, as long as it harmed Little Black, it had to die! The alloy short knife in his hand emitted a dazzling light, and at the same time, David decisively activated the Space Blade, preparing to give the zombie a deadly blow with all his might. However, just as he was about to approach the zombie, the zombie unexpectedly extended its arm and forcefully blocked the attacks of the alloy short knife and the Space Blade!

This caught David by surprise! He couldn't believe that this guy could block his attacks with its arm. After all, his alloy short knife and Space Blade had killed countless zombies, even some high-level ones. How could it be that they lost their power when facing an intelligent zombie?

This resistance, also scared Monica, who was watching from the side. The zombie stared at David with its eyeless sockets, its facial expression becoming increasingly varied. It looked at David as if he were a clown. Then, it quickly raised its right hand and aimed for David's heart with its razor-sharp nails.

Seeing the knife-like nails on the zombie's hand, David knew that if it reached his heart, his life would be over. Without thinking too much, he immediately opened a spatial portal and teleported himself behind the zombie, narrowly evading its deadly attack.

Gripping the knife, David took two steps back cautiously, keeping a close eye on the zombie. The zombie also turned around and stared at him, shaking its head continuously. David's brain spun rapidly as he recalled how the supernatural beings in his previous life had killed these intelligent zombies.

As far as he knew, the skin of intelligent zombies was extremely tough, especially on the arms, chest, thighs, and face. These four areas were practically impenetrable to ordinary weapons, as any contact with them would instantly render the weapons useless. That was why in his previous life, when intelligent zombies appeared, no matter what the superhumans did, they couldn't resist them, ultimately leading the world to destruction.

"That's not right!" David suddenly whispered as he recalled his past life. "As long as it's a zombie, it must have a weakness. I just need to find its weakness and attack!"

David remembered that in his previous life, some surviving scientists discovered through dissecting intelligent zombies that although their skin was tough, they also had weak spots. As long as these weak spots were found, the zombies could be killed. So David observed the intelligent zombie in front of him and began to contemplate.