The apocalypse had arrived, but the ancient civilization pushed it back just as the world was about to end time and time again. Through multiple folds of the world's information, they had turned a world that should have been closed alongside the apocalypse into an open system, avoiding a horrible future—future where everything was annihilated.
So every time the world was damaged to its very limit, and just as the power of the Mad Lord was about to consume all order, the world would restart. It was like reading a file and starting over. The ancient civilization had used this way to reject the apocalypse, and until today, the cycle and delay had already happened too many times to be counted.
While the delaying tactic seemed indefinite, the truth showed that the ancient civilization could not totally pull it off.