The Great Mutation

"We've made a horrific accident here when we're using the Forced Evolutionary Virus. This was a disastrous event today when some of the flora and fauna are being mutated, and mutation's being spreaded across the world. Uncontrollably. Well... non-stop. How can I stop that before things get an uneven turn for the worse?"

--Su Ji-Hoon, Uncontrollable Mutations

The Great Mutation is an disastrous event where the Forced Evolutionary Virus spreaded all across the world uncontrollably by accident.