"Sigo Buntz, mage and sorcerer in residence at the court at Pont Vanis. This tower was to be me new home. Bought it in an auction, you see."
Sigo Buntz is a Koviri mage who lived in his residence in Pont Vanis on court of King Tankred Thyssen. Sigo and Geralt meets under quite unussual circumstances on An Skellig, where sorcerer is trapped behind a magic barrer inside the mysterious tower, tower he bought in auction after death of previous owner. To free him, Geralt needs to find Gottfried's Omni-opening Grimoire and help him deactivate Defensive Regulatory Magicon.