For as long as horror movies featured villains and monsters, they highlighted the frightening creatures known as demons. A demon is a supernatural being that is associated with evil among other unspeakable characteristics. Demons frequently appear in religion, literature, occultism, fiction, folklore, and mythology. They have also invaded all types of media like comics, television and of course. Movies. What are these frightfully fascinating creatures and what is their origin? And why are they so devilishly popular? Get ready to suffer nightmares and frights galore, as we descend into the true heart of darkness to confront the world's most horrifying demons!