Prereleases are usually four rounds of play but could be more or less depending on your store and player turnout
As long as your deck runs heavy on draw and discard, you fill your graveyard up with expensive spells (or cheap ones simply by casting them), then once this big boy hits the battlefield, you can start reigning terror on your opponents by casting those big spells from beyond the grave for free
In a world where most tables dont want to see cards like Stasis or Armageddon, which make the game unplayable for lots of decks, what happens when you roll up with a card that makes one persons deck, in particular, unplayable
The same is true for fear, first strike, double strike, landwalk, protection, trample, and vigilance
Wizards has failed with its reprint sets over the past couple of years