Ixalan

Deadeye Plunderers | Creature | Human Pirate | Deadeye Plunderers gets +1/+1 for each artifact you control. {2}{U}{B}: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") | Greg Opalinski

Hostage Taker | Creature | Human Pirate | When Hostage Taker enters the battlefield, exile another target creature or artifact until Hostage Taker leaves the battlefield. You may cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any type to cast that spell. | Wayne Reynolds

Marauding Looter | Creature | Human Pirate | Raid — At the beginning of your end step, if you attacked this turn, you may draw a card. If you do, discard a card. | Jason A. Engle

Shapers of Nature | Creature | Merfolk Shaman | {3}{G}: Put a +1/+1 counter on target creature. {2}{U}, Remove a +1/+1 counter from a creature you control: Draw a card. | Chris Seaman

Tishana, Voice of Thunder | Legendary Creature | Merfolk Shaman | Tishana, Voice of Thunder's power and toughness are each equal to the number of cards in your hand. You have no maximum hand size. When Tishana enters the battlefield, draw a card for each creature you control. | Anna Steinbauer

Admiral Beckett Brass | Legendary Creature | Human Pirate | Other Pirates you control get +1/+1. At the beginning of your end step, gain control of target nonland permanent controlled by a player who was dealt combat damage by three or more Pirates this turn. | Jason Rainville