Spriggan is a type of creature or spirit that comes from Cornish folklore, which is a collection of stories and legends from a place called Cornwall, in England.
These spriggans are known to be mischievous and sometimes even dangerous, but they can also be helpful if they like you. They are said to be small and ugly with a wrinkled face, long arms, and fingers like claws. They often got into mischief by stealing or hiding things or causing trouble at night when people were sleeping.
In some stories, they were considered guardians of treasure or sacred places, and anyone who tried to disturb these places would be in big trouble. Other tales say they would kidnap young children or livestock and take them away to their secret hiding places.
Overall, spriggans are fascinating and mysterious creatures from Cornish folklore, a little like naughty goblins that you don't want to cross.