"Everyone has a primordial soul and divine sense, which are dependent on and exist with the body. For ordinary people, when the body dies, the divine sense will also disappear. Once the divine sense is destroyed, the body will also die. However, when one's cultivation reached a certain level, even if one's body was destroyed, one's consciousness would not disappear. One could even cultivate into a spiritual body. By the same logic, even if one's consciousness was destroyed, as long as one's body wasn't too severely damaged, one could still preserve it for a long time.
As a result, some people developed the undead secret technique and refined these corpses, whose divine sense had been destroyed but whose bodies were still intact, into undead puppets. These people were experts when they were alive, so even if they were refined into undead puppets, they could still retain half of their strength when they were alive. " Xiao Chuan said.