The Last Night of the Rusty Blade

The system said: If you survive for 1095 days, you can go home.​ When Sun Wen woke up, he only had a rusty dagger in his hand, and the taste of blood was in his mouth. There is no panel, no skills, just a line of cold marks: [Special Observation Unit]. Zombies wander outside the door, mutated eyes glow in the dark, and ancient symbols on the wall ooze blood. And he gradually discovered—— This world is a carefully designed "screening", and those indescribable beings are watching every struggling "sample" through the gaps in the system. Rustbone Fortress survivors say: Don't go to the basement, don't listen to those noises. But the woman deep underground opened her black eyes in the container and mouthed to him: "Run quickly, they are coming."​ —— This is a war for survival waged by mortals against an unknown god. Cut off the night with a rusty blade.