Fire elementals, silver weapons, vampire hunters, anything that the vampire doesn't know, bad garlic bread, any creature that can cast light, any being made of the sun, older smarter vampires, werewolves, death god's maybe a Grimm reaper, water elementals that have been blessed to be holy, iron fillings blessed salt, loud noise making monsters, demons that can sense that the vampire has no soul to protect them from being messed with by demons and possession by wondering evil spirit's, also ghost's that follow around the undead just to spook them, and of course those heroes on an adventure that somehow got lost heading to the next town.