Wikipedia
Strigoi
In Romanian mythology, strigoi ( English: striga, poltergeist) are the troubled spirits of the dead rising from the grave. Some strigoi can be living people with certain magical properties. Some of the properties of the strigoi include: the ability to transform into an animal, invisibility, and the propensity to drain the vitality of victims via blood loss. Strigoi are also known as vampires.