I can think of more than a few wincons in black that cost four mana value or less that I'd love to essentially run a second copy oflike Aetherflux Reservoir
II Tap up to two target creatures
Players take turns battling one another by casting spells, summoning creatures and using artifacts depicted on individual cards drawn from their personalized decks
Then you net that sweet ramp of a Forest and that's even better
Another point in Doomskars favor is the ability to cast it for three mana on turn five, while still having mana left up to answer a follow-up play
This would suggest that, even if the lands are only worth $2.00 a piece while the set is in print, they could be worth a lot more in the future, which would not only make the lands themselves a good investment but the sealed booster boxes (which again have a land in every pack) a good investment as well, like past Un-sets