Spriggan

This is my version of a Spriggan (pronounced "spree-jan"), a typically Cornish category of fairy, whose ugliness, malevolence and propensity to manifest at night earned its classification in the Unseelie Court, at the same title as Dullahans and Nuckelavees (although such a classification originated more in Scotland).

Spriggans are therefore generally counterfeit and endowed with a wrinkled, rocky-looking skin, allowing them, by cowering, to pass unnoticed in the ruins, cairns or mounds they inhabit (which has earned them be compared to Paracelsus' Gnomes, and to trolls). These spirits are indeed the guardians of the treasures hidden in such places, and, although most of the time they are small in size, they have the power to grow into real giants, according to "Popular Romances of the West of England" by Robert Hunt. Many people have therefore come to regard them as the ghosts of the giants that once populated Britain. Additionally, no matter their size, the Spriggans retain colossal strength, as well as the power to manipulate the weather, surprising travelers with squalls or tornadoes, and destroying crops with true storms.
Like many fairies, these spirits sometimes kidnapped human babies and replaced them with changelings, who were then raised by the human parents. They were also blamed for burglary, theft of cattle, or when a house collapsed. Luckily, iron, upturned clothes, and holy water could be used to prevent a Spriggan's intrusion.

In Unseelie fairy society, they would generally be given the roles of soldiers and/or bodyguards.