Survival in a Giant Building: My Broken Room Can Be Infinitely Upgraded

A giant building from around the world is coming, and everyone is forced to allocate initial rooms. Someone draws an S-level energy core room and reaches the sky in one step. Someone was drawn to the A-level medical room, which had constant resources. There were also people who were assigned to Class B dormitories and barely survived. And I only grabbed an abandoned utility room. A Class D room that was moldy, leaky, and even the door was almost rotten. Everyone said I wouldn't survive the first night. Until I awakened the hidden prompt system—— [This utility room is actually the only initial room that can evolve infinitely. When others grab resources, what I see is pollution. While others tried their best to upgrade, I found hidden routes. While others cling to their rooms, mine is constantly evolving. When the dark fog fell on the first night, they discovered—— The safest room is not the A-level room, but my "junk room".