Cailleac Bhuer/Black Annis/Blue Hag/Stone Woman

Cailleac Bhuer is a monster from Scottish folklore. She appears as a monstrous old woman with blue skin and a single eye, and when seen on the road, she often presents herself as a struggling old woman. She is believed to haunt moors and rocky passes. She is viciously hungry and targets lone travelers, beating her victims over the head to knock them out, and dragging them away to be consumed. She sits on a pile of human bones and when human prey is unavailable she kills livestock. She often has a crow on her shoulder that acts as a familiar.

Citations:

Maberry, Jonathan. Vampire Universe: The Dark World of Supernatural Beings That Haunt Us, Hunt Us, and Hunger for Us. United States, Kensington Publishing Corporation, 2006.