The End of the World: Wandering Until the End of Life

The mysterious black ball arrives, and the earth is quietly rewritten. Humanity shrunk to eighteen centimeters overnight, civilization collapsed, and everything evolved. Hundreds of thousands of creatures merge with each other, and the law of the jungle becomes the only law. Reality is distorted, and small lives struggle to survive in desperate situations. Who can win the right to survive in the new world... Light system [No immortality and supernatural powers] [Light fantasy, does not correspond to reality]