The demon Urian is the inspector general of black magic and sorcery and has dominion over all witches, according to German mythology. Appearing as a giant black goat, this demon copulates with witches and presides over their sabbaths.
In a German folktale, Urian crossed the Rhine at Dusseldorf with a large pack on his back filled with evil to destroy Aix-la-Chapelle. As he climbed the embankment to enter the city he was frightened by an elderly woman and dropped his pack. To this day the bank in that region is known as Looseburg.