In Scottish folklore the Biasd Bheulach is a monster or spirit that haunts Odal Pass on the Isle of Skye in Scotland.
[3][4] The Biasd Bheulach is a nocturnal shapeshifter described by John Gregorson Campbell in Witchcraft and Second Sight in the Highlands and Islands of Scotland (1902): Sometimes it bore the form of a man, sometimes of a man with only one leg.
At other times it appeared like a greyhound or beast prowling about, and sometimes it was heard uttering frightful shrieks and outcries which made the workmen leave their bothies in horror.
Campbell states that "it was considered impossible that these wounds could have been inflicted by human agency.
"[3] He further mentions that the attacks ceased after the victim's body was found,[3] which led the folklorist Katharine Briggs to suggest that the monster may have been the ghost of a murdered man looking for revenge.