Vârkolak
The Vârkolak was a type of vampire from the region of Kosovo, in Southeastern Europe.
Biology
The Vârkolak was an undead creature that fed on on the blood and flesh of living creatures -- usually humans, but animals would also be attacked. Ladies would often end up being sexually assaulted by Varkolaks, later giving birth to children from them.
The Vârkolak was invisible, and only hunted at night. Far from being indetectable, though, they did leave footprints, and could be seen using a set of Infrared night vision goggles. Also, the child of a Vârkolak (called a Dhampir) could see it. Such children frequently became Vampire Hunters.
Bullets could wound a Vârkolak without requiring any special properties, like being holy or silver. Killing a Vârkolak was accomplished the same way as most vampires: a wooden stake through the heart.
History
Vârkolak attacks were reported around Kosovo up through the 1950s, when the reports stopped due to Communist takeover of the area. After the fall of the Communist Bloc, the country was too disorganized and violent to notice any possible attacks.
In the early 21st century England had a fairly stable gang supplying illegal immigrants from China willing to dig up cockles from the beaches in South End. When Immigration cracked down on the Chinese labor, the gang moved to cheaper immigrants from Kosovo. However, the Kosovans decided they didn't need the Chinese gang, and imported a Vârkolak from their homeland to kill off the Chinese. Unfortunately the Vârkolak proved far more successful than expected, and killed off most of Kosovans as well.
UNIT sent Colonels Emily Chaudhry and Robert Dalton to South End to investigate the murders. With the help of recently arrived Vampire Hunter Goran, they succeeded in killing it. (BFU: Snake Head)