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Toss in some Commander play (where the enchantment greatly improves any budget manabase full of tapped lands) and potential in the Gates decks in Pioneer, it's looking like Spelunking will be the chase uncommon of the set
You might already know that theres another way (outside of alternate win condition cards) to win a game of Magic: when your opponent must draw a card with an empty library
I fully expect the price on nonfoil uncommon FCAs to drop dramatically over time, rares and mythics will still be hard to pull but there will be a fair amount more of the nonfoils out there, thanks to the Play Boosters
If we weaken the strong cards, it's only fair that we occasionally strengthen the weak ones
By this logic you could refine things very precisely in terms of land spell ratio by going a 42, 43 or 9000013 card deck but that level of precision is simply beyond reasonable calculation