The Fossegrim is a water spirit who plays enchanting music on the violin. Usually depicted as a beautiful, semi-clad or naked male, the Fossegrim is tale of both good and bad. On the one hand, the Fossegrim is sometimes known to teach humans how to play the violin as beautifully as he, but only if they sacrifice a goat. If the goat is too lean, the Fossegrim will only teach how to tune the fiddle. But a sufficiently prime goat will make for a lesson until the player's fingers bleed, at which point they will be able to play so well as to make the trees in the forest dance. Alternatively, he could lure women or children to a watery demise within the lake or stream in which he resides.