Urza Planeswalker is a fictional character from the universe of Magic: The Gathering, best known for his millennia-long struggle with Yawgmoth and the plane of Phyrexia. First explored in the Magic card expansion, Antiquities, Urza is one of the collectible game's notable heroes.
Urza was born on the first day of the year 0 AR to a noble family of Argive, one of the three coastal kingdoms of Terisiare. His younger brother Mishra was born on the last day of the same year. Urza's mother died while giving birth to Mishra, so his father took another younger wife who did not like the brothers. Ten years later his father fell ill. Fearing the fate of his sons after his death, the father sent Urza and Mishra to his old friend Tocasia to serve as students at her archaeological dig.
Under Tocasia's guidance, the two brothers learned a large amount about the manufacture of artifacts from the archaeological excavations of the ancient ruins of the Thran, the mysterious civilization that ruled Terisiare thousands of years prior. During this time, Urza developed a talent for study. Rarely having a hands on approach, he would prefer to study the artifacts the excavations uncovered rather than participate in the diggings.
Over their years at Tocasia's camp, Urza and Mishra made several important inventions and discoveries. While the most obvious of these was the ornithopter[http://ww2.wizards.com/gatherer/CardDetails.aspx?name=Ornithopter], the most important turned out to be the Caves of Koilos. A mysterious cave filled with old Thran artifacts, the Caves were also the location of a long-sealed gateway to Phyrexia, used in every Phyrexian infiltration and invasion of Dominaria. On their first visit, Urza and Mishra each acquired one half of the powerstone that had been holding the portal shut. Mutual desire for the other brother's stone led to a falling-out between Urza and Mishra, as well as the inadvertent death of Tocasia. With her death, Mishra ran away into the desert. With the encampment disbanding, Urza had to leave his precious artifacts and go elsewhere to seek his fortunes.
Read more about Urza, Planeswalker at Wikipedia ...
Official Site: Wizards of the Coast
Links: Wikipedia FAQ on Planeswalkers Storyline Central on Urza