Before the Alien Beasts Besieged the City, I Suddenly Awakened to a Mysterious Power

This is a novel about a human city being besieged by alien beasts. The protagonist "Xiao Cheng" awakens a mysterious power before the alien beast siege breaks out. The protagonist "Xiao Cheng" of the novel is a man who has spent all his luck awakening the mysterious power, causing every hope to be pinned in despair. That is why the "Hope City" created by Xiao Cheng gives hope to human beings to reproduce! But this city, when it was built again and again, fell again and again!