This creature was known as a bogheighst. They weren't dangerous to living things, but were highly territorial, as they mainly fed on rot and decay; but that didn't stop Rarity from hauling flank away from the nightmarish creature, as the beast let out a territorial 'roar' after Rarity ran away, which sounded like backwards screaming pony whinny. Its true scream is said to render listeners unconscious. 