If Redcap Gutter-Dweller leaves the battlefield after its last ability has triggered, you can still sacrifice a creature and exile the top card of your library, even though you won't put a +1/+1 counter on Redcap Gutter-Dweller
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
Plot also plays well with storm-style decks
Even if you feel like the precon may be a bit lacking or you want to play it differently, its easy and straightforward to upgrade
Tyranid Swarm - Universes Beyond: Warhammer 40K Ive had games that have been won because my Haruspex has gained so much power that it deals huge damage to opponents, or converted its power to mana for a big late-game push