Tsurashi, Flame-Blessed Elder

Whenever Tsurashi deals combat damage to a player, exile that many cards from the top of your library in a face-down pile, then shuffle that pile. Then the defending player reveals the top card of that pile. If it's a nonland card, you may cast it without paying its mana cost, then put the rest of the exiled cards on the bottom of your library in a random order. If it's a land card,