Monster Cataclysm 2124

[Transformation+sequential abilities+super strong heroine+short story (there will be a second part later)] In 2124 AD, because of a country that lived a good life - Country R, it had been discharging nuclear sewage for a hundred years, which caused great changes in the earth's ecology. Finally, the first monster disaster broke out on July 1, 2124 AD, and this day was also called Monster Catastrophe Day by future generations. The first monster disaster lasted for six months. Country R was completely destroyed, but all the monsters that caused the disaster disappeared below the sea level. After the monster catastrophe, all major countries have launched emergency plans. The Nova Project led by China, the Special Warrior Plan led by America, the Mecha Plan led by Soviet Russia, etc. Have all been launched one by one. And countries began to build guard cities, build large-scale fortifications, and build underground cities to prepare for possible disasters in the future...