Well, this is terrifying. Imagine a scenario similar to the creepy and popular video game series, Five Night’s at Freddy’s. The souls of both evil murderers, and their victims, find themselves trapped in animatronic monstrosities. Instead of following the games, what if this happened for every murder?! The animatronic that the murderer and the victims become bears resemblance to the method and motive of the kill.
These cursed souls stalk the land, and they can only escape their eternal prisons by destroying one another. The victims seek out their killers, who move in the shadows, hunt new victims, and do what they must to survive, even in their awful, twisted forms.
It’s not a world I’d want to live in, but hopefully it sounds just a little bit creative!