The Death is a skeleton with scythe in his hands, with a hood, without a face. [it is my description, Mr. Pratchett describes him much better. That is why he is great author and I am not ;-) ]
http://en.wikipedia.org/wiki/Death_(Discworld)
He calls himself "an anthropomorphic personification". The Death talks in booming voice that is represented in book BY CAPITALS.
Only wizards, witches, small children and people who are about to die can hear the Death.
A king closely escapes yet another assassination attempt and hides in a closet.
"IT IS DARK IN HERE, ISN'T IT?"