I have an idea for a story:
My setting is reminiscent of some computer games, in that Player Characters (PCs) are essentially immortal - they reincarnate indefinitely, and can continue to kill the non-Player Characters (NPCs). However, my story is not just about the PCs - it is from the point of view of the NPCs, who are being hunted for no real reason, by essentially immortal creatures, who become more powerful over time (a.k.a level up). Thus, the horror element of my story. (There is also the point of view of some PCs who have come to understand this environment, and thus follow a non-violent path.)
PCs affect many elements of the story, going as far as having an entire enemy type dedicated to their obliteration, until it got out of hand...
I don't want to go on big detours to show (not tell) how frightening PCs can be, hence most of them are "disabled" by now. How can I still convey a sense of dread that lingers when PCs are brought up, without such detours?