Recross the Paths

Reveal cards from the top of your library
until you reveal a land card. Put that card
onto the battlefield and the rest on the
bottom of your library in any order.
Clash with an opponent. If you win, return
Recross the Paths to its owner's hand.
(Each clashing player reveals the top card of their library, then puts that card on the top or bottom.
A player wins if their card had a higher mana value.)