Pogrebin

These annoying little creatures are native to Russia. They love to follow people around, infusing them with a sense of hopelessness until the human collapses, at which point the Pogrebin attempts to devour them. They can be fought off with Stunning spells or hexes, or a good kick. The Pogrebin resembles a grey rock with a small hairy body and it hides by crouching down and pretending to be nothing but a harmless stone (FB).