" I do not carry a sickle or a scythe. I only wear a hooded black robe when its cold. And I don't have those skull-like features you seem to enjoy pinning on me in the distance. You want to know what I truly look like? I'll help you out . Find yourself a mirror while I continue."
Death ( he narrates the story) would put something in the story that would shock you. As usual, people would have different expressions when they would read/see/hear something shocking. He would want you to find a mirror so you could look in it and see your expression. this is how he would describe what he looks like: your face.