Daemons

Daemons, often called Demons, are not hellish creatures at all, but instead are unnatural denizens of Anagod that cannot seem to find a place.
Born of Darkness Magic, they feed on Holy energy as given off by souls and that which floats ambiently around the realms in which they exist. For this reason, they live most comfortably in Hell, where they are not punished for feeding and can catch scraps more often.
Daemons are the biggest threat to Reapers, and will often target them after a big collection like a battlefield or mass catastrophe. It won't be odd for a flock to descend upon a lone reaper, either, but after gains are gotten, fights amongst one anotehr can start, giving them a reputation for lacking loyalty. (Really, they're just hungry.)