When ripples of strange elements appeared in the air, no one realized that this was the world's "exclusion notice" to human beings——
Animals tear off their docile skins, vines wrap around the skeleton of skyscrapers, and even the dead bones under the rotten soil break out of their coffins and return to the world with overwhelming hatred for living creatures. Heavy rain can freeze steel bars, and hurricanes can roll lava over cities. Nature, which once supported civilization, has now become the most ruthless executioner.
And human beings are the only "defective products" in this frenzy of evolution of all things: they have no fangs, and they have to struggle in the poisonous mist to even breathe. When high-rise buildings are shattered by giant trees, and mechas are turned into scrap metal under the claws of beasts, when new elven species and resurrected ancient beasts share the world, humans can only hold on to rusty knives and ask one question in the gap between famine and hunting:
Are we still a "living" species?
Do you want me to help you add an opening clip of the protagonist's first encounter with the mutation to make the introduction more graphic?