Mark Rosewater broke down the full contents in both his Comic-Con panel and this follow-up article, but heres a brief overview of what you can expect: 1 art card from Zendikar Rising (81 total) 1 basic land card (can be foil) 6 commons and uncommons that are thematically related 1 showcase or other alt-art card 2 wildcards of any rarity 1 rare/mythic rare card 1 foil card 1 token, ad card, or a card from The List The List is a collection of 300 cards from Magic s history that replace the token or ad card in 25% of Zendikar Rising Set Boosters
This could avoid making Purple overpowered, and would help give Purple players more options if they want to build a deck
Third, you can play a grindy game, as recurring Order of Midnights make sure you never run out of steam and doubling up on both Murderous Raider and Bonecrusher Giant actually lets you kill the cards your opponent casts
is also a decent removal option, albeit an expensive one, that you can run in punctuation matters decks with Blood for the Blood God
A strong mana ramp means you should always have access to mana for casting spells, but instead of this being achieved through artifacts, there are instead creatures you can tap for mana