Wait until almost every country is infected. Once the world population is 90%+ infected, start unleashing hell. Evolve symptoms that increase lethality drastically, such as Total Organ Failure or Hemorrhagic Shock. This creates a sudden spike in deaths that collapses the world’s population and economy before they can finish the cure.
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: Start with a basic Bacteria and unlock Virus, Fungus, Parasite, and more. Evolution System Wait until almost every country is infected