Reborn After the Black Calamity, I Report It to the State at Once

[Post-apocalypse + Reporting to the Nation + Ensemble Cast + National Destiny + Rules Horror + National Infrastructure] When the supernatural becomes a set of rules, only national strength can serve as the ultimate torch. I was reborn three years before the Black Calamity arrived. That day, darkness fell, and countless ghostly shadows, insect swarms, and monsters appeared one after another. I knew that the shadows obeying the eerie rules would erase every trace of human civilization as time went by, starting on November 17, 2038. This time, I didn't stockpile supplies or build a personal safe house, because I knew I couldn't fight this alone. Instead, I chose to hand over everything I knew about the Black Calamity to my country. At first, they thought I was a madman or a spy. But as I proved my claims bit by bit, the nation began to take me seriously. And so, the most tragic and grandiose plan in human history, the secret “Nirvana Plan,” was launched because of me alone. The whole nation marshaled its strength to build the “Underground Great Wall” and “Ark of Civilization,” projects previously seen only in science fiction. The Rune Research Institute deciphered the logic behind the ghost shadows' killings; heavy industry conglomerates smelted special alloys capable of reflecting the supernatural; millions of construction workers concealed their identities as they dug deep into the earth. When eternal night fell and swarms of insects and black shadows engulfed the world, survivors in other countries struggled to stay alive among the ruins. But in the East, one steel wonder after another, bearing the last remnants of civilization, slowly sealed its gates, each weighing tens of thousands of tons. But I knew this was only the beginning. The real terror lay in the “rules” that could evolve and learn. Only when the Level 9 shadows arrive will you understand just how weak humanity is.