In the fictional multiverse of , Yawgmoth, called the Ineffable by his servants, is the god of the plane of Phyrexia. He was born on Dominaria during the reign of the Thran about 5000 years before the birth of Urza. He was banished for his belief that diseases were caused, not by evil spirits, but by viruses and bacteria, only to return to treat Glacian, the genius of Halcyon, who was stabbed with an imperfect powerstone by an Untouchable named Gix.