Bloodlines

The Artifacts Cycle is a tetralogy of Magic: The Gathering expansion sets centered on the exploits of Urza Planeswalker. It consists of the expansions Antiquities, Urza's Saga, Urza's Legacy and Urza's Destiny. The latter three sets are sometimes referred to as an "Urza block" for tournament purposes, since there have been formats and time periods in which cards from the later three sets were legal but cards from Antiquities were not. However, the books "The Brothers' War", "Planeswalker", "Timestreams", and "Bloodlines" unambiguously confirm that, from a story and thematic point of view, "Artifacts cycle" is correct and it begins with the events depicted in Antiquities.