Mikolasak

In the Basque mythology, the Mikolasak are small imps of great strength who always live in groups.

Myths & Legends
They are skilled builders, working the stone that can be used to build large buildings or bridges in one night. The construction of the bridges of Azelain, in Andoain (Gipuzkoa) and Kastrexana (Biscay) are attributed to them.

They stay away from humans because of their cantankerous and stubborn personality.