User blog comment:EDN1980/God/Demon/Angel/Monster Weaknesses/@comment-1509826-20130313192617

Okay weakness wise, your right some of them are just made up by the writers, as a way for them to find for the heroes to defeat the enemy of the weak, but actually the majority of the time they may attention to the lore.

Most notably for Monsters, Dragons the majority of stories involve the hero killing the dragon with his sword. As for the Pheonix, they never actually give that a weakness (other than iron) and just use the colt to kill it, which is belivible as far as I know, in no stories does anyon kill a pheonix for Djinn and Shtriga I've never read that, I think they were just trying to find a way make the kill unique. But for Vampires, Werewolves, Changelings, Wendigo, and shapeshifters thats right. There are stories of decapitating vampires dating back to ancient rome. Despite what wikipedia says, although not common, there are stories of using silver to kill werewolves dating back to the sixteenth century (but in argument werewolves are alot older than that) burn changelings, any tale will tell you that (or trick them) for Wendigo its one for the four things all legends agree on, fire kills. And for shapeshifters, basically the same as werewolves, using silver agaist shapeshifters is an old belief. The rest are mostly creative licence.

As for Demons, sure in any european and middle east folk tale, will tell you to use iron or salt or holy water to drive them off. And Exorcisms are present in all cultures, they predate christanity, many native american tribes have there own. As for the killing part, sure there are a lot of stories about magic weapons killing what is ment to be unkillable. And Angels being able to kill demons, is simply common sense.

As for angels, thats all invented, in no story does it state you can stop or kill angels, because in next to no story would you want to, angels are almost always (in fact always, just not always to everyone) the good guys, who never use there powers on those who don't deserve it. As such all there weaknesses (angel blade, Enochian magic, Holy fire) are all made up, and quite reasonable, as in the supernatural universe there would need to be a way for them to stop each other.

Leviathans are invention of the show, so there weaknesses are also inventions, mind you using a naturally occuring mineral, that is as old as the earth to face ancient beings, makes perfect sense. As for the Horsemen, there weaknesses are likewise invented, the poing being there not ment to be stopped till the end. As for ghosts, sure iron and salt will drive them off, its common in many cultures, Iron's an age old symbol of protection, Salts an age old symbol of Purity, so both driving them away makes perfect sense, as ghosts are unclean spirits. Burning them, sure in many stories ghosts walk the earth because there bodies were never put to rest, by destroying the body it was belived they would be permently put to rest, so thats the lores reason for why it became popular. And not being able to walk on hallowed ground, comon in nearly ever culture that has hallowed ground. As for Amazons, sure the legends describe many heroes killing them the same as ordinary people.

As for fairies, sure salt, Iron and silver are all comon in the lore, and using magic to get rid of them, or force them to do what you want, appears alot, particually in british folklore. As for deties, sure the stakes are made up, but not without source, many cultures have gods dying, norse, aztec and slavic for example. Normally due to godly weaponary, as used every so often in the show. And all the stakes make perfect sense, I mean an evergreen stake to kill the gods of the winter solsitas, a stake of a tree hit by lightning to kill the god of thunder, a 3000 year old stake to kill the god of time ect. Also using magic agaist gods, happens quite often, although it is normally done by other gods in the lore.

I think thats all the creatures to appear in supernatural, please inform me if I missed any. So basically yeah, there is a lot of creative licence, but they do do quite a lot of research for a paranormal show, most shows generally just make up what ever weaknesses they like.