Yuriko, the Tiger's Shadow and Gwenom, Remorseless both let you cast whatever your put on top, with the former doming your opponent for what is hopefully a ton and the latter acting as a Bolas's Citadel on a stick, essentially putting into play everything you tutored with Dreams and potentially assembling a game-winning combo, like this one, maybe
14 Magic cards + 1 additional play object in every Draft Booster
I guess its proper place will be defined once Bloomburrow actually releases and we see how well it fares
A Play Booster Box contains 30 booster packs, each Play Booster contains: 14 Magic: The Gathering cards 14 cards of rarity Rare or higher 35 Uncommon cards 69 Common cards 1 Land card
Being able to target opposing lands can also help with fixing, or let you nab powerful utility lands like Shifting Woodland
So, going by Magic's rules, this seems to be a card that you must 'tap' (turn sideways and exhaust for the turn) and pay some mana (or ink) to draw a card