These are the main creatures from hell. On the outside they are human in almost everyway. You know when they've been in a room when there are traces of sulphur lingering. They possess abnormal powers; speed, sight and senses and when they 'demon-out' then their eyes go pitch black.
Saying 'Christo' will show a demons true form.
Demons are usually made my possessing a human and can be trapped with a Solomon's key and an exorcism spell.

Werewolves eh? Well, all that lore you were told about turning into hairy dog-like creatures is a bunch of crap. When a werewolf turns, they loose all shred of humanity about the time of the full moon and their teeth grow - in all they become the ugliest mother f'ers imaginable.
Silver can hurt them but only a silver bullet to the heart can kill them. Werewolves also have a tendency of taking their victims heart.

Pretty self explanatory if I do say so myself. Nearly everyone knows about Vampires. When they are about to feed, instead of only their canines growing, a whole new set of retractable vampire fangs sprout from their gums.
They can walk about during the day so you'll never be able to tell who's a vampire. Could be your teacher, your best friend or hell, even a family member.
One fact that hunters know is that vampire's mate for life and, if you kill a vampires mate then you're pretty much digging your own grave - because vampires are also good at holding grudges forever.

There are few of these in the world; they are the children who are to become soldiers of darkness. Their powers range from telekinesis to visions. They were blooded by Azazel aka the Yellow Eyed Demon. Most of them are dead but there are still some lingering throughout the States.