Because in recent years, the world has been plagued by natural and man-made disasters, with severe pollution resulting in blood mutations throughout the population. Zombies who bite living humans suffer from the pain caused by this "GMO blood," becoming weaker and weaker. Those who die are dead, those who are lost are lost, their numbers gradually decreasing until now, only it remains.,Guan Heng stroked his chin and rolled his eyes, saying, "Lan De, can you give me some intel on who our opponent is",At the end, a gigantic black shadow exuding a stench of decay stared down at him with contempt for all inferior beings. Guan Heng cried out in disbelief: "What in the world is this thing"。