The Quest for Karn — Robert B. Wintermute

Mirrodin -- a world of living metal, an artificial ecosystem created by the Planeswalker Karn to support organic life -- is on the cusp of cataclysm. When the Planeswalker Venser goes in search of his former mentor, he learns Karn's life hangs in the balance -- and with him the entire plane of existence. For fans of the mega-selling trading card game, Magic: the Gathering®, the full story behind Scars of Mirrodin, a revisitation one of Magic's most popular settings.