librum-prodigiosum:

Furfur is a Goetic demon depicted as a winged hart, or sometimes as an angel. He is a Great Earl of Hell who commands twenty-nine legions.

Furfur can create storms and make men and women fall in love. He is known to be a liar, unless he is compelled to enter a magic triangle, in which he can only give true answers.

Image source.

Monster master list.

Suggest a spook.

@simonalkenmayer