Everyone Survives in the Apocalypse, Only I Choose the Structure

We are friends with both wars, but we don't like to squirt lightly. Wake up and travel across the Lost Continent with billions of people in Blue Star in the early morning to participate in a doomsday survival game with humans as the protagonists. Here, countless zombies are rampant and extremely dangerous! At the beginning of the game, each human being can choose a unit building for him to drive. Dragons, elves, tree men, orcs... Early morning passed through the arms panel one by one until the last page. Randomly, he was surprised to find that he had actually triggered the hidden unit! "Congratulations on getting the only hidden weapon: the construct!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.