Rivals of Ixalan

Aquatic Incursion | Enchantment | | When Aquatic Incursion enters the battlefield, create two 1/1 blue Merfolk creature tokens with hexproof. (They can't be the targets of spells or abilities your opponents control.) {3}{U}: Target Merfolk can't be blocked this turn. | Jason Rainville

Crafty Cutpurse | Creature | Human Pirate | Flash When Crafty Cutpurse enters the battlefield, each token that would be created under an opponent's control this turn is created under your control instead. | Grzegorz Rutkowski

Deadeye Rig-Hauler | Creature | Human Pirate | Raid — When Deadeye Rig-Hauler enters the battlefield, if you attacked this turn, you may return target creature to its owner's hand. | Victor Adame Minguez

Kumena's Awakening | Enchantment | | Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) At the beginning of your upkeep, each player draws a card. If you have the city's blessing, instead only you draw a card. | Zack Stella

Riverwise Augur | Creature | Merfolk Wizard | When Riverwise Augur enters the battlefield, draw three cards, then put two cards from your hand on top of your library in any order. | Alayna Danner

Seafloor Oracle | Creature | Merfolk Wizard | Whenever a Merfolk you control deals combat damage to a player, draw a card. | Simon Dominic

Siren Reaver | Creature | Siren Pirate | Raid — This spell costs {1} less to cast if you attacked this turn. Flying | Tomasz Jedruszek

Spire Winder | Creature | Snake | Flying Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) Spire Winder gets +1/+1 as long as you have the city's blessing. | Titus Lunter

Deadeye Brawler | Creature | Human Pirate | Deathtouch Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) Whenever Deadeye Brawler deals combat damage to a player, if you have the city's blessing, draw a card. | Jesper Ejsing

Storm the Vault | Legendary Enchantment | | Whenever one or more creatures you control deal combat damage to a player, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") At the beginning of your end step, if you control five or more artifacts, transform Storm the Vault. | Victor Adame Minguez