Clash of Ideologies

Shuffle your library. Clash with an opponent. (Each clashing player reveals the top card of his
or her library, then puts that card on the top or bottom. A player wins if his or her card had a higher converted mana cost.)
Repeat this process until a player wins a total of seven times. The player to reach seven wins first, draws until he or she has seven cards in
hand and gains 7 life. The other player puts the top seven cards of his or her library into his or her graveyard.