Doomsday Lord: My Shelter Can Be Infinitely Upgraded

Ten years after the apocalypse, Chen Yuan was reborn and returned to ten years ago. At this time, we have to face the coming apocalypse again. Powerful mutant zombies, strange zombies, armored zombies... The mutated beasts that destroy the world, the Purple Lightning Liger, the Death Rolling Crocodile... Fortunately, he awakened the system, got a doomsday shelter, and got the lord profession. As long as you kill unlimited zombies and mutant beasts, you can upgrade the shelter infinitely. Doomsday Gatling upgrade, destroy laser turret... Ordinary fence upgrades, million volt power grid... Super solid defensive armor upgrade, circular energy shield... In the sanctuary, he gradually gave birth to a new civilization. The shelter can be upgraded infinitely, and the Virgin is not allowed to enter. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.