Demons are the departed spirits of dead Nephilim killed before and during the flood. They roam the earth harassing humans and seeking re-embodiment. In books of the Bible that follow Genesis, descendants of the Nephilim of Genesis 6:1–4 are called Anakim and Rephaim (Num. 13:32–33; Deut. 2:10–11). Some of these Rephaim show up in the underworld realm of the dead (Isa. 14:9–11) where the Serpent was cast down. New Testament writers would later call that place hell.
Interesting. Unclean or impure spirits?
