Yumi blinked as she listened. Such things were basic back at the shrine. But, it wouldn't hurt to have a refresher's course.
Morita nodded, glancing at Willow from the corner of his eye, then back at the screen. He recognized the beings very well, as things that would make one's memories fuzzy. But, they were also things that led bigger demons to people.
"They are attracted to dark, dank places, as well as humans with dark natures. Breathing them in can cause one's lungs to rot. They usually swarm around other demons." The teacher continued, turning to a photo of a biopsy of a human's rotted lungs. The lungs were black, and filled with maggots, though the date showed that the body had been decomposing around three hours before hand.