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

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

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