While the obvious first home for Urza's Cave is Tron decks as a failsafe for games where it's difficult to assemble the three Urza lands necessary for the strategy's explosive mana acceleration , it's also interesting to consider what else Urza's Cave can do in decks featuring Knight of the Reliquary, Elvish Reclaimer, and the Modern Horizons 3 reprint Sylvan Safekeeper
But more to the point, the potential was there to make the deck manipulation theme work by substituting packages of cards out to shift focus
The card is in MINT+ condition, graded CGC 9.5, and comes from a
Make sure to use a perfect fit sleeve for best results
First things first, there are a LOT of zip files here (to make uploading easier)
Even though some of these precons are floundering for a core identity, the wonderful part about these clan-based or guild-based sets is that you just get to pick what works best for your playstyle and personality