Describe one supernatural element in the story

"A sail! A sail!" Mysteriously, the approaching ship managed to turn its course to them, even though there was still no wind....The Ancient Mariner's initial joy turned to dread as he noticed that the ship was approaching menacingly quickly, and had sails that looked like cobwebs. The ship came near enough for the Ancient Mariner to see who manned it: Death, embodied in a naked man, and The Night-mare Life-in-Death, embodied in a naked woman. The latter was eerily beautiful, with red lips, golden hair, and skin "as white as leprosy." Death and Life-in-Death were gambling with dice for the Ancient Mariner's soul, and Life-in-Death won.