If that had been six Play Boosters, then a player could use them to build a Sealed deck and that would also be a lesson in deck-building
In Japanese Set and Draft Boosters, each time you get a Mystical Archive card, it is a 50% split of being either the global version (printed in the Japanese language) or the Japanese alternate-art version (which is always exclusively in Japanese language)
A Commander that keeps our battlefield full of creatures and our hand full of cards
Eternal Might is a mid-range aggressive deck that signposts much of its plays through the graveyard so, as long as you can keep just enough firepower to rebuild a board, and take every single chance you can to draw cards, the undead masses should put up a deadly fight at any table
Kozilek, the Great Distortion is a great example since it refills your hand in addition to being a massive body
According to Wizards' Wednesday announcement, there are ten different booster themes