Alongside the sweet snowy designs on the covers, if you're curious what comes with each of these items, here's the breakdown: the booster pack sets you up with 12 cards, including six Common cards, three Uncommon cards, two cards of either Rare, Super Rare, or Legendary rarity, and one random foil card
Green Sun's Zenith can help you get Emrakul right onto the battlefield, but you wont benefit from its cast trigger or cost reduction
If you exile Flitting Guerrilla, the second "reflexive" triggered ability will trigger
5 Add: Crystal Barricade Cut: Nyx-Fleece Ram Swapping one two mana creature out for another makes for an easy exchange, but with Crystal Barricade, you get a much better deal out of it
Blinkmoth Nexus has its own upsides, but it is slightly worse overall
And it's a house in Bloomburrow Sealed and Drafts