There's only one Master Emerald, and it's kept considerably more secret
Able to deal with virtually any problem, Capsize couldn't be dealt with through conventional means (you'd usually have to kill your own creature to have a chance of fizzling Capsize)
I could also see this as a finisher for a Control deck
This will give you an extra pack per day while also giving you access to premium missions
Of course, the Set Booster pack will also have a guaranteed rare or mythic rare card, which is no different than the same slot found in Draft Boosters
This is approximately 8.065810 67 (80,658 vigintillion) possible orderings, or specifically 80,658,175,170,943,878,571,660,636,856,403,766,975,289,505,440,883,277,824,000,000,000,000