In the End of the World, My Mushroom Buildings Can Be Upgraded Infinitely

There is no fancy magic or fighting spirit here, only mushrooms that have evolved to the extreme. One day, two huge countdowns appeared in the sky. When one week is up, various strange props will drop from the sky; when January is up, everyone will be transported to a new environment. Spore Apocalypse, Dinosaur Park, Ice Field of Despair, Mermaid Island, Age of Titans... Survivors need to become mushroom garden directors and strengthen the [Mushroom Beasts] and [Mushroom Buildings] in their mushroom gardens by collecting energy soil and various cards to cope with the ever-changing environment. Or become a slave to other mushroom garden directors, and live or die by them. The mushrooms grown by everyone have a level limit, and they will become stronger each time they are upgraded. But Cao Xuan has the unlimited ability to upgrade various mushrooms. When the [Mushroom Machine Gun], which other mushroom garden directors looked down on, had a level limit of only 3, was upgraded to hundreds of levels, it could actually fire hundreds of millions of mushroom bullets in one second. What about [Mushroom Cannon] and [Mushroom Mecha]? [Fire Breathing Mushroom][Duck Armor Mushroom] Where are these mushroom beasts? So far—— A mushroom garden with hundreds of kinds of [Mushroom Beasts] and [Mushroom Buildings] that broke through the restrictions was armed to the teeth and began to sweep across all major ecosystems... "My surname is Cao, from Cao Cao." "I would rather teach me to bring down the world!" [Mushrooms, farming, survival, infrastructure, evolution, decisive killing]