Aarni

Aarni: "A spirit or dragon, which is believed to be lying on top of buried treasure. Aarni is seen cleaning and polishing his mouldy treasures in forests and on hill-slopes; often he is heard clinking his gold crowns when he is favourable to some melancholic worshipper of money. [Aarni's] temple was a room in an ash-grove, where trees never sprouted leaves...birds did not sing on the branches; only a few ravens built their nests thereupon. There magpies cackled, wolves howled and owls hooted. Shepherds did not bring their flocks there, for the ground was unwholesome. The air was heavy in the grove's vicinity. At night strange apparitions were seen there." - Kristfrid Ganander, Mythologia Fennica.