The cave was dark and damp, illuminated by the faint fluorescent light of the plants.

Vines entwined the stone walls, dark green, dark purple, and dark black, like a large, entangled snake.

A black flying insect stumbled in, with six hard wings and three mouthparts.

The next second, a huge dark purple bulge suddenly appeared among the entangled vines, and it quickly split open, like an open mouth, and in the next moment it closed in an instant, swallowing the flying insect into its stomach.

The vines slowly squirmed, and the bulged part gradually retracted and returned to its original state.

A sound like flapping wings echoed in the cave, and a drop of mucus dragged a translucent thread from the top of the cave, and fell into the sticky moss on the surface with a plop. They squirmed slightly, and the drop of glittering mucus was quickly absorbed and disappeared on the surface.

Corner - the corner was illuminated by the fluorescent light of green fungi. In the cracks between rocks and soil, white surged out like a tide, covering a large area. It was snow-white mycelium. It grows longer, spreads, stretches out hundreds of millions of tentacles, and finally crawls toward the center, closing, gathering, stretching, and a shape emerges. A foot steps on the thick and soft moss, and the moss sinks and swallows it, leaving only the snow-white ankle.

Anzhe looks at his ankle - it belongs to the human limbs, supported by the skeleton, muscles and blood vessels. The joints can move, but they are not flexible due to the limitations of the bones. The stratum corneum constitutes the nail, which is round and transparent, and is a product of regression, coming from the sharp claws of animals.

He lifted his leg and took a step forward. The moss that had been sunken by being stepped on before was wet and elastic. After he left, it gathered together again, like an upright earthworm.

This time, he stepped on something different, a human skeleton arm.

In the dim light, An Zhe looked at the skeleton.

Fungi and vines had taken root deep in the skeleton. Dark green vines were entwined around the hip and leg bones, and brightly colored thin mushrooms grew on the ribs, like blooming flowers.

Fluorescent mushrooms emerged from the empty eye sockets and sparse teeth. The green light was like fine quicksand, blurry in the fog of the cave.

An Zhe looked at it for a long time. Finally, he bent down and picked up a backpack made of animal skin beside the skeleton. The items stored in the backpack were not contaminated by moisture. They were a few pieces of clothes, human food and water, and a blue crystal half the size of a palm. The crystal was engraved with the number: 3261170514.

Three days ago, this skeleton was still a living human.

"3261170514," the young human's voice was hoarse and intermittent, and the dim green light in the cave illuminated his face. "This is your ID number. This is your ID card. You can return to the human base with it."

An Zhe asked, "Can I help you go back?"

The human smiled, and the fingers of his right hand drooped softly at his side. The crystal rolled out of his hand and disappeared into the high and low moss. He leaned against the mountain wall, raised his head, and pressed his left hand on his chest - there was a huge wound there, with a gray-white bone spur piercing through his chest and back, and the skin around it had already rotted away. One part was gray-white, with flocculent flesh covering the surface of the bone spur, and the other part was dark green, with gray-black turbid liquid dripping down in rhythm with his breathing.

He took a few breaths and whispered, "I can't go back, mushroom."

His shirt was stained, his skin was pale, his lips were cracked, and his body was shaking irregularly. An Zhe looked at him, not knowing what to say. In the end, he only muttered the young human's name: "An Ze?" "How old are you to learn human language?" The human looked down at his body. In addition to pus and blood, there were also snow-white mycelium on this body, which was part of An Zhe's body. The mycelium was long and winding, tightly attached to the wounds on An Ze's limbs and trunk. The mushroom was meant to stop bleeding for this dying human, but out of function, the mycelium also absorbed and digested the fresh blood that flowed out. "Eating the genes will allow you to learn so many things? The pollution index of this is indeed very high." The human said. Fragments of knowledge unfolded in An Zhe's mind. After five seconds of conversion, he knew that the pollution index meant the speed of gene conversion. Now, the genes from humans flowed into An Ze's body along his blood. "Maybe... when I die, you can eat my whole body... and you will get a lot of things." An Ze looked at the top of the cave and curled his lips: "That seems to be a meaningful thing, although I don't know whether it is good or bad for you." An Zhe didn't say anything, and moved his whole body towards An Ze. He hugged An Ze's shoulders with his newly grown human arms. A large number of fungal hyphae surged over and accumulated beside An Ze, supporting his shaky body. In the silent cave, there was only the sound of dying humans gasping. After a long time, An Ze finally spoke again: "I am a person whose life is meaningless." "...I am not outstanding in any way, so it is normal for them to abandon me. In fact, I am very happy not to go back to the human base. It is the same as the wild there, where... valuable people can survive. I have wanted to die for a long time, but I didn't expect to meet a gentle creature like you, a mushroom, before I die." An Ze was not very clear about the meaning of those nouns, such as value, such as death. He just caught that noun again, the human base. He leaned on An Ze's shoulder and said, "I want to go to the human base." An Ze: "Why?" An Zhe raised his left arm slightly, and waved his fingers in the air, as if he wanted to catch a void of air, but he caught nothing. Just like his body. His body was empty. A huge hole emerged from the deepest part of his shell, which could not be filled or healed. What followed was endless emptiness and panic, which entangled him day after day. He organized human language and said slowly: "Lose... spores."