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.,Chapter 2: The Mysterious Ancient Sword and the Dragon's Heart Flame,After an unknown amount of time, he suddenly felt the temperature around him fluctuating. "Hmm... where is this place" Guan Heng sat up abruptly, startled awake. "Ah, ah-choo—freezing!"。