Busie is a creature from manchu myths. People who were murdered after their death turn into bird-like creatures with steel paws and jaws. In the dark of the night they crawl into people's houses and eat their eyes, noses and ears with their extra-mouth placed on their necks.
In old times they used to tear apart wooden walls of houses or dig holes in floors but nowdays they've learnt how to hack digital locks. Now they have tails with USB on it's tip. Some kind of cyber-undead monsters Х) The only thing that could kill them is lightning, because busie have electricity in their bodies but have no ightning rods to protect them.