Slayer-esque Supernatural freemasons?

They're merciless, relentless hunters and killers of things that have no right to exist. They are a secret organization of enhanced humans that serve as equalizers against a threat that most of the world has no idea exists. They use conventional as well as unconventional mystical weapons loosely based on stolen artifacts and objects of power to hunt monsters. The agents themselves are indeed human enhanced by a slightly magical hereditary bloodline. . People want to believe they can change the world before it changes them. These are the people that makes sure it plays out that way.