Buffy finds out why she is being hunted by the nightmare monster from fourteenth-century France and also why the slayer from that era is determined to halt it.
Elegantly, the same goes for the overarching story, in which the nightmare monster is less frightening than daylight family.
Think of the worst nightmare monster, then imagine it come to life, stalking you through your house, passing through walls and closed doors, seeking you out wherever you hid.
There came another heavy door with the name in gold and this time with a nightmare black monster, with a vicious beak, above it.
Dan wondered what nightmare monster stalked her.
He had believed the bear he had seen fleeing the fire to be a giant, but this one was a nightmare monster.
Nine nightmare monsters arrayed in a semicircle before me.
He looked like something that stepped off the cover of a cereal box, and those wacky, wandering, off-center features were halfway between a nightmare monster and an idiot mask.
A vivid imagination could have easily conjured up visions of nightmare monsters from an alien world lurking in the darkness ahead, but reality revealed an empty, hollow chute, nothing more.
He appeared in Jack Kirby and Joe Simon's short-lived series The Sandman, where he was protected from nightmare monsters by the titular hero.