This version of Urza's Mine is by far the funniest of all its reprints and alternate arts
There is no way to buy single cards you need from a retailer
Modern Horizons 3 keeps that high standard going, with a Draft format that can support a range of nuanced playstyles
If something causes Urzas Saga to lose its chapter abilities without removing the saga subtype, it will be immediately sacrificed as a state-based action because it has no more chapters that need to resolve
General Kreat, the Boltbringer is a more on-theme version of the effect, and Agate Instigator works quite well, too
For example, the above card has only the characteristics of Halvar, God of Battle in the graveyard, even if it was Sword of the Realms on the battlefield before it was put into the graveyard