Global Freeze: My Upgradable Doomsday Shelter

[Card Drawing] + [Shelter Unlimited Upgrade] + [War] + [Mutation] "Entering my range is equivalent to entering my country. Have you figured out how to die?" "Close the door tightly, don't let me come back too easily." When the chaebol threw him out of the gate like garbage, the lower-level maintenance worker Lu Yuan glanced at the city wall and smiled. Turning around and walking into the Wasteland of Ashes, binding the lord upgrade system, Lu Yuan turned a dilapidated air raid shelter into an absolute restricted area in the wasteland. While others were fighting for two mouthfuls of muddy water with hatchets and guns, Lu Yuan sat in the underground central control room blowing the air conditioner while the red dots on the screen went in and out one by one. In the early stage, the focus was on violent thermal weapon defense, cross-fire from automatic machine guns and bunkers, high-voltage power grids that roasted mutant beasts into coke, mine arrays that allowed predators to take off on the spot, and close-in defense cannons that detonated armored convoys like peeling oranges. The chaebol drives old-era mechas to engage in technological dimensionality reduction? Lu Yuan turned on the electromagnetic matrix, and the twelve heavy-armored mechas instantly lost power and turned into iron coffins. The rescued aloof evolver transformed into a "knife" in his hand, took the initiative to go out to attract monsters, and helped him rack up points in the central control room. The chaebol is jealous of his water and electricity and wants to send the main force to snatch it? Lu Yuan refused to negotiate, and threw out an S-level natural disaster card [Lava Hell] with his backhand, which directly melted the entire solid chaebol fortress into a large pit of magma. Underground air raid shelters, war mecha depots, floating sky cities, until the final Star Destroyer fortress!