I Became a Curse Spirit

It becomes a curse and can grow by killing people, so why can't it destroy all human beings in a single thought? Of all human emotions, which one is the most deadly? I was mankind's strongest line of defense during my lifetime, and I will be mankind's greatest terror after death. What humans fear most is the unknown. When all kinds of ghosts appear in people's lives, can you still live peacefully? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.