The Viy of Maribor was a horrible creature conjured by the mage Alzur. It was a giant centipede or myriapodan, but larger than any other of its kind. It killed Alzur and destroyed half of the contemporary city of Maribor. In The Witcher, the books The Double Cross of Alzur and tower mage's book mention this terror. The former allegedly contains the instructions on how to create one.
