Wurdulac
From Wikipedia, the free encyclopedia
Wurdulac, also spelled "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, and Mario Bava made a 1963 portmanteau film of it starring Boris Karloff called Black Sabbath.
A wurdulac is also the subject of Monster in My Pocket #116.