12 Scariest Horror Movie Villains

It goes without saying that The Exorcist is one of the scariest films of all time. Standing strong on its practical effects even 34 years later, the tale of possession is one of the most visceral to ever grace our screens - no matter how hard filmmakers have tried since to replicate the split-pea soup nightmare, there's something special about this film.

Of course, it's little girl Regan's body that's used like a camping ground for a malicious entity, twisting her innocent frame into something dark and abject. Pazazu is the demon interested in her eternal soul, and boy, does he ramp up the scary in a bid to keep a hold of it; turning Regan into a monster in the process.

There's a tough choice between what's more frightening: Regan's freshly mutated appearance, or Pazazu's invasive occupation of her body.