Fast mana from Sol Ring, Ancient Tomb, Skirk Prospector, and Jeska's Will help you to cast key pieces early, while Lightning Greaves, Swiftfoot Boots, and Thousand-Year Elixir make sure that Krenko can tap right away and survive removal
You get to pick your choice of either giving a creature you control flying, vigilance, or lifelink for a turn, depending on your needs
Each player chooses two cards from the pack and puts them face down in front of them, then passes the remaining cards to the player on their left
The rares (and for Unstable , mythics) of Un-sets work the same way, with a twist: demand isn't based on playability, since none of the cards (discounting the black-border Steamflogger Boss reprint) are tournament playable
Either way, Emrakul is a powerful beater that sees heavy play in both Modern and Commander
This deck has a ton of great auras and Preston will help you cast them all by untapping a bunch of lands during your turn