In the year 2147 of the New Era, a rift in the underground abyss broke out, and monsters counterattacked the human continent. Ninety percent of shelters were reduced to ruins overnight, and millions of humans became prey for beasts.
Ling Feng, nineteen years old, lost his parents in the ruins. He was dragged onto a transport plane by the military "recruitment team" and forcibly sent to the seventh shelter - the biological armor project experimental site. The survival rate is 7%. He is Experimental Subject No. 7.
The moment the living symbiote was implanted into the spine, severe pain tore through his consciousness. After seventy-two hours of rejection struggle, six of the six batches of experimental subjects died. Ling Feng was the only one to survive - because the symbiote in turn devoured the deadly rejection fragments. Saved his life.
The tattoo on the back began to breathe. It will be hungry, in pain, angry, and scared. It's not a mecha, it's not a tool, it's a living beast that grows on his body. The food that feeds it to become stronger is the crystal core of the underground monster's brain.
Lingfeng led this beast to stand up from the ruins, and led his brothers from being crushed to being crushed - until he discovered that the end of becoming stronger is to become the monster itself.
