River of Forgetfulness in the Wrong Position

Yi Qing scanned the group of ghosts. This was shocking! Did these ghosts all suffer from amnesia at the same time, or did the culprit act so fast that they did not even have time to react before they found themselves dead?

He asked them more questions to understand the situation better, and found that not only did they forget how they died, they even forgot everything that had happened to them while they were alive. They did not even remember each other's names! That was why they referred to each other as "Headless Ghost" or "Opened Ghost".

Yi Qing frowned even more deeply. From the number of ghosts there were in front of him, it was obvious that someone had wiped out the entire city. The strange thing was that he had not sensed an array being set up around the city. They also did not meet with any obstacle along the way. Why were the ghosts trapped here then?