The wilderness was desolate and silent, as if even traces of life had been swept away by the storm of the end of the world. In this boundless wilderness, Xiao Yi walked alone, carrying a heavy bag and taking firm steps forward.

His eyes were as sharp as an eagle's, constantly alert to the surroundings. Although there was no sign of life here, dangers were everywhere in the apocalypse, and any negligence could bring fatal consequences.

After a long trek, Xiao Yi felt a little tired. He looked around and decided to stop here for a short rest. He found a relatively flat place, put down his bag, and began to build a temporary camp.

He skillfully drew the dagger from his waist and began to clear the weeds and gravel on the ground. Soon, a simple camp was set up. Xiao Yi took out some dry food and water from his bag and simply filled his stomach.

He sat by the camp, closed his eyes, and rested, recovering his strength. Although all around him was silent, his heart was filled with vigilance and unease. He knew that the dangers of the apocalypse came not only from ferocious beasts and cunning enemies, but also from unknown factors and unpredictable changes.

However, Xiao Yi is not someone who gives up easily. He firmly believes that as long as he has enough strength and wisdom, he will be able to survive in the apocalypse. He constantly hones his skills and improves his strength so that he can better cope with future challenges.

In this desolate wilderness, Xiao Yi is alone, but he is not alone. His heart is filled with firm beliefs and unyielding will, which makes him stronger and braver in the wilderness of the end of the world.

After resting, Xiao Yi picked up his bag again and continued on his way. He knew that the road ahead was still long, but as long as he had faith and courage, he would be able to keep going.

Xiao Yi calmly watched the approaching zombies, the long sword in his hand flashing with a cold light, as if forming a sharp contrast with the desolation of this apocalyptic world. The zombies roared, their steps were heavy and clumsy, but the stench emanating from them was chilling.

Xiao Yi moved, as swift as a cheetah, and instantly rushed into the zombie horde. He swung the sword in his hand, and each slash was precise and powerful. The zombies' heads exploded under the sword's edge, and black blood and rotten flesh splattered everywhere.

He wasn't afraid of the filth, because he knew that survival in the apocalypse was a battle with death, and only the strong could survive. He swung his sword continuously, and the sword light drew deadly arcs among the zombies.

Soon, the number of zombies began to decrease, and more and more zombies fell to the ground. Xiao Yi took the opportunity to step aside and take a breath. He knew that this was only a temporary victory. The number of zombies was still huge, and he had to remain vigilant.

He looked around, searching for his next target. Suddenly, a huge zombie stood out from the crowd and rushed towards Xiao Yi. Its eyes flashed red, and it seemed more ferocious than the other zombies.

Xiao Yi took a deep breath and rushed forward. He engaged in a fierce battle with the zombie, sparks flying as his sword clashed with the zombie's claws. After a fierce battle, Xiao Yi finally found the zombie's weakness and stabbed it in the head with his sword.

The zombie let out a final roar, then collapsed. Xiao Yi immediately squatted down and began to dig out the crystal core from the zombie's brain. He carefully cut open the zombie's skull with the dagger in his hand, revealing the crystal core that emitted a faint glow.

He carefully took out the crystal core and placed it in his palm to examine it carefully. The crystal core was a deep blue, as if it contained endless power. Xiao Yi knew that this crystal core would be the key to improving his strength.

He placed the crystal core into a specially designed container in his bag, ensuring it wouldn't get damaged. Then, he stood up and continued to fight the zombies. He knew that only by constantly killing zombies and collecting crystal cores could he survive in this apocalyptic world.

As time went on, Xiao Yi's movements became more and more skilled, and the speed of killing zombies became faster and faster. He no longer simply swung his sword to chop, but began to use various techniques and tactics to make it difficult for the zombies to get close.

Finally, when the last zombie fell, Xiao Yi felt a wave of fatigue. But he did not stop to rest, but immediately began to clean up the battlefield and collect all the crystal cores. He knew that these crystal cores would be his driving force to move forward and his hope of survival in this apocalypse.

The zombie crystal cores are Xiao Yi's most important trophies. These crystal cores not only symbolize the life essence of the zombies, but are also a scarce source of energy in the apocalypse. The color and energy contained in the crystal cores of zombies of different levels are also completely different.

The lowest-level zombies, often newly transformed, are slow-moving and intellectually deficient. Their crystal cores appear grayish-white, as if covered in dust. The energy they carry is weak, serving only as a basic energy supplement and offering little benefit in improving strength.

As the zombies' levels increased, the color of their crystal cores began to change. Some of the more powerful zombies had crystal cores that appeared light blue, like the rising dawn, revealing a faint sense of vitality. These crystal cores contained relatively strong energy and could be used to craft simple tools and weapons. For Xiao Yi, they were a rare and precious resource in the apocalypse.

More advanced zombies are no longer simply walking corpses, but possess a certain degree of wisdom and power. The crystal cores of these zombies are dark blue, like gems in the deep sea, shimmering with a mysterious light. The energy they contain is powerful and pure, and can be directly absorbed by Xiao Yi to enhance his strength and restore his physical strength.

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