The Lost Caverns of Ixalan

Confounding Riddle | Instant | | 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}. | A. M. Sartor

Hurl into History | Instant | | Counter target artifact or creature spell. Discover X, where X is that spell's mana value. (Exile cards from the top of your library until you exile a nonland card with that mana value or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.) | Eli Minaya

Bitter Triumph | Instant | | As an additional cost to cast this spell, discard a card or pay 3 life. Destroy target creature or planeswalker. | Donato Giancola

Dreadmaw's Ire | Instant | | Until end of turn, target attacking creature gets +2/+2 and gains trample and "Whenever this creature deals combat damage to a player, destroy target artifact that player controls." | Crystal Sully

Zoyowa's Justice | Instant | | The owner of target artifact or creature with mana value 1 or greater shuffles it into their library. Then that player discovers X, where X is its mana value. (They exile cards from the top of their library until they exile a nonland card with that mana value or less. They cast it without paying its mana cost or put it into their hand. They put the rest on the bottom in a random order.) | Nestor Ossandon Leal