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

Another Chance | Instant | | You may mill two cards. Then return up to two creature cards from your graveyard to your hand. (To mill two cards, put the top two cards of your library into your graveyard.) | Irina Nordsol

Join the Dead | Instant | | Target creature gets -5/-5 until end of turn. Descend 4 — That creature gets -10/-10 until end of turn instead if there are four or more permanent cards in your graveyard. | Olivier Bernard

Huatli's Final Strike | Instant | | Target creature you control gets +1/+0 until end of turn. It deals damage equal to its power to target creature an opponent controls. | Marta Nael

In the Presence of Ages | Instant | | Reveal the top four cards of your library. You may put a creature card and/or a land card from among them into your hand. Put the rest into your graveyard. | Steve Prescott