Confounding Riddle [The Lost Caverns of Ixalan]Set: The Lost Caverns of Ixalan Type: Instant Rarity: Uncommon Cost: {2}{U} Choose one Look at the top four cards of your library. Put one of them into your hand and the rest into your graveyard. Counter target spell unless its controller pays 4. Explorers learned not to tamper with sites of ancient power without learning their purpose.