Tiangong Catalog: the Era of Food Spirits

World rules: All extraordinary powers are obtained from food. The east and west continents are separated by the endless black sea. The east coast was destroyed, and the protagonist's father led 400,000 survivors across the sea to survive. On the way, they encountered unknown terrorist forces. Only 200,000 people survived and reached the west coast. Ninety percent of them fell into coma, including his father. The "Tiangong Illustrated Book" he awakened is not a magical secret book, but a complete hard-core system that combines industry with spiritual energy and demonic energy. Coupled with the pair of qi-gazing eyes that can see through all energy trajectories, the whole world has changed in his eyes. Magic, aura, fighting spirit? Essentially it's all the same thing - the energy converted from food only counts when it enters the stomach. He used it to build an industrialized system of food and energy, based on foreign lands, and competed with Western magic, knights, elves and other races. In the end, from the exile of the remnants to the unification of the Western Continent, he awakened his father, led his people across the endless black sea, fought back to his homeland on the east coast, and paid for his debt with blood.