The Vampire Hunters.

A vampire hunter or vampire slayer is a character in  who specializes in finding and destroying vampires, and sometimes other supernatural creatures. A vampire hunter is usually described as having extensive knowledge of vampires and other monstrous creatures, including their powers and weaknesses, and uses this
knowledge to effectively combat them. In many works,vampire hunters are simply humans with more than average knowledge about the occult, while in others they arethemselves supernatural beings, having superhuman abilities.Vampire hunters often keep themselves physically and mentally strong in order to be able to seek out and face their opponents. They often use special weapons, surprise or stealth tactics in order to be able to overpower their much stronger opponents. Hunters' crusades against vampires go almost as far back as vampirism itself.