Karzełek
The Skarbnik (from Polish skarbnik – person collecting money, treasurer) or Kladenets (Ukrainian: Скарбник, Russian: Кладенец; the Treasurer) or Dzedka (Belarusian: Дзедка) in Slavic mythology is a spirits who lives in mines and underground workings and is the guardian of gems, crystals, and precious metals. It is said that he will protect miners from danger and lead them back when they are lost.