The Wurdulac, also spelled wurdalak or verdilak, is a type of Russian vampire that must consume the blood of its loved ones and convert its whole family. Alexei Tolstoy wrote most famously of one such family. ... Found on http://en.wikipedia.org/wiki/Wurdulac
1) Slavic legendary creature 
The Wurdulac, also spelled wurdalak or verdilak, is a type of Russian vampire that must consume the blood of its loved ones and convert its whole family. Alexei Tolstoy wrote most famously of one such family. ...