Rivals of Ixalan

Champion of Dusk | Creature | Vampire Knight | When Champion of Dusk enters the battlefield, you draw X cards and you lose X life, where X is the number of Vampires you control. | Josh Hass

Dead Man's Chest | Enchantment | Aura | Enchant creature an opponent controls When enchanted creature dies, exile cards equal to its power from the top of its owner's library. You may cast spells from among those cards for as long as they remain exiled, and you may spend mana as though it were mana of any type to cast those spells. | Jason A. Engle

Dire Fleet Poisoner | Creature | Human Pirate | Flash Deathtouch When Dire Fleet Poisoner enters the battlefield, target attacking Pirate you control gets +1/+1 and gains deathtouch until end of turn. | Ben Maier

Mastermind's Acquisition | Sorcery | | Choose one — • Search your library for a card, put it into your hand, then shuffle. • Put a card you own from outside the game into your hand. | Svetlin Velinov

Tetzimoc, Primal Death | Legendary Creature | Elder Dinosaur | Deathtouch {B}, Reveal Tetzimoc, Primal Death from your hand: Put a prey counter on target creature. Activate only during your turn. When Tetzimoc enters the battlefield, destroy each creature your opponents control with a prey counter on it. | Zack Stella

Tomb Robber | Creature | Human Pirate | Menace {1}, Discard a card: Tomb Robber explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.) | Xi Zhang

Vona's Hunger | Instant | | Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) Each opponent sacrifices a creature. If you have the city's blessing, instead each opponent sacrifices half the creatures they control, rounded up. | Zack Stella

Profane Procession | Legendary Enchantment | | {3}{W}{B}: Exile target creature. Then if there are three or more cards exiled with Profane Procession, transform it. | Bastien L. Deharme

Journey to Eternity | Legendary Enchantment | Aura | Enchant creature you control When enchanted creature dies, return it to the battlefield under your control, then return Journey to Eternity to the battlefield transformed under your control. | Deruchenko Alexander