Hunters of Letrua
Demons are beings created by Magic, and thus are pure magic, condensed into a solid form. As they are not truly alive, they lack normal bodily functions and have only one desire; Kill. This quality makes them extremely dangerous, as they feel no fear, pain, or even individuality, and will attack with all they have until killed. Something which is particularly strange is that the magical energy which forms them disperses extremely slowly for magical energy, such that their corpse will decay only twice as fast as a regular one, and some remains, such as the bones and blood, do not decay at all, though none have been able to determine why this may be.