The Long Song of Blood Descendants

We are born at dawn and guard the night. Before the birth of human civilization, there once existed a glorious and splendid civilization, guarding the last line of defense of this fragile world. As time goes by, ancient civilizations are eliminated by time, and the survivors disappear among mortals. When the war comes again, can their descendants turn the tide and once again become the Great Wall to block the coming of night and save our world? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.