Rumplestelt

Rumpelstelt was the gnome who helped Zivelina onto the throne of Metinna. In exchange, she promised her firstborn to him. However, when Rumpelstelt came for the child, Zivelina used magic to banish him. After a while, both the queen and her firstborn died of the plague.

Rumpelstelt's story is counted among the examples of the Law of Surprise, of the consequences of trying to deny Destiny, and it's referred to in the short story A Question of Price.

Trivia

 * In Real World, his story's told under the name of Rumpelstiltskin.