Rivals of Ixalan

Fathom Fleet Boarder | Creature | Orc Pirate | When Fathom Fleet Boarder enters the battlefield, you lose 2 life unless you control another Pirate. | Sidharth Chaturvedi

Forerunner of the Coalition | Creature | Human Pirate | When Forerunner of the Coalition enters the battlefield, you may search your library for a Pirate card, reveal it, then shuffle and put that card on top. Whenever another Pirate enters the battlefield under your control, each opponent loses 1 life. | James Ryman

Sadistic Skymarcher | Creature | Vampire Soldier | As an additional cost to cast this spell, reveal a Vampire card from your hand or pay {1}. Flying, lifelink | Seb McKinnon

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

Voracious Vampire | Creature | Vampire Knight | Menace When Voracious Vampire enters the battlefield, target Vampire you control gets +1/+1 and gains menace until end of turn. | Kieran Yanner

Jungle Creeper | Creature | Elemental | {3}{B}{G}: Return Jungle Creeper from your graveyard to your hand. | Matt Stewart