They'll contain three common cards, two uncommons, one 'wildcard' of any rarity, and a seventh card that may be "a land, a traditional foil, or a Special Guests card"
While it's not going to be a big play on a small board, any deck that can throw out lots of creatures, like a tokens or aggro deck, will suddenly become the end of the game
Turn / Burn Turn / Burn can deal with any creature when fused (including indestructible ones) and is an excellent tool for dealing with big threats
As reported by ComicBook, those who attended the event and found some of the rarest cards special Enchanted variants that aren't guaranteed in an entire box of 24 booster packs are selling them on eBay for hundreds of dollars
You look at three cards, which is one less card than you see with Impulse
So I don't think this one will see play, unless you have a lot of other item synergies in your deck