Doomsday System: I Hoarded 30 Floors Before the Apocalypse

When black mist devours civilization, only the prepared survive. Mu Chen watched the world end from his high-rise fortress—30 floors packed with supplies, each level a lifeline in humanity's darkest hour. Outside, mutated plants tear through steel and glass. Ravenous beasts stalk the corridors. Desperate survivors claw at his door. But Mu Chen has something they don't: a mysterious system that rates survival potential and rewards the ruthless. As screams replace pleas in the building's group chat and grotesque faces press against his peephole, he faces an impossible choice—share his hoard and…