Goblin

Goblins are mythological creatures of unclear origin and contradicting descriptions. They are small humanoids of a mischievous nature, possibly belonging to the fey family (along with creatures such as redcaps, brownies, leprechauns, kobolds, etc).   The origin of the word "Goblin" can be traced back to the British "Gobelinus" which was the name of a demon that once caused trouble in Normandy. It has been theorized the term began with Kobold, which was a German Fey spirit whose origins can be traced to one of a variety of earlier myths based in Paganism from various other culture. Kobolds also gave their name to cobalt, due to the fact that new advances in mining in Germany during the middle ages allowed access to large amounts of cobalt ore, although the mining was very dangerous and they had no idea how to smelt the metal so as a result the numerous mine collapses as well as the "theft of the ore, with only poison and ash left behind" were blamed on Kobolds. Either way, Goblin myths often involve mischief, mining, and chemistry.