Recitation of the Mythos

Whenever you have fewer than 30 cards in your library, or if the top card is face up, sacrifice Recitation of the Mythos.
At the beginning of your upkeep, name a card, then reveal the top card of your library. If that card is the named card, repeat this process until names don't match or each card matches the named card. If all cards match, you win the game. Otherwise, put the revealed cards on the bottom of your library in any order.