Nightgaunt

Nightgaunts, in the Cthulhu Mythos, are servants of the Lord of the Abyss Nodens, and are creatures of the dreamlands. They are described as being black, faceless beings with rubbery slick skins and a set of horns on the head. Winged and impossibly thin, the Nightgaunts capture the unwary traveller and tickle them into submission while taking them to the lower realms of dreamland. They are often used as steeds by the ghouls of the deeper dreaming, and do not like to fly over any bodies of water.

They appear in the poem "Night-Gaunts" and the story "Dream-Quest of Unknown Kadath," both by H. P. Lovecraft. Lovecraft's inspiration for them were nightmares he had as a boy.