Ixalan

Bonded Horncrest | Creature | Dinosaur | Bonded Horncrest can't attack or block alone. | Jesper Ejsing

Brazen Buccaneers | Creature | Human Pirate | Haste When Brazen Buccaneers enters the battlefield, it 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.) | Joseph Meehan

Captivating Crew | Creature | Human Pirate | {3}{R}: Gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn. Activate only as a sorcery. | Winona Nelson

Rowdy Crew | Creature | Human Pirate | Trample When Rowdy Crew enters the battlefield, draw three cards, then discard two cards at random. If two cards that share a card type are discarded this way, put two +1/+1 counters on Rowdy Crew. | Steve Prescott

Thrash of Raptors | Creature | Dinosaur | As long as you control another Dinosaur, Thrash of Raptors gets +2/+0 and has trample. | Jonathan Kuo

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

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