Black Court vampires are the type of vampires described in Bram Stoker's Dracula. They are dead bodies animated by evil power and fueled by blood. All Black Court Vampires are evil in nature, and not only willingly but gleefully end the lives of humans.
Black Court Vampires are basically the same as in Bram Stoker's Dracula: Can't abide sunlight, garlic, holy water. Can't cross running water without a bridge or a driver. Can't enter a private home without being invited. Massive strength and toughness. Can mesmerize and turn people into Fine Thralls, Rough Thralls, or Renfields.