Ixalan

One With the Wind | Enchantment | Aura | Enchant creature Enchanted creature gets +2/+2 and has flying. | Naomi Baker

Shaper Apprentice | Creature | Merfolk Wizard | Shaper Apprentice has flying as long as you control another Merfolk. | Yongjae Choi

Shipwreck Looter | Creature | Human Pirate | Raid — When Shipwreck Looter enters the battlefield, if you attacked this turn, you may draw a card. If you do, discard a card. | Wayne Reynolds

Siren's Ruse | Instant | | Exile target creature you control, then return that card to the battlefield under its owner's control. If a Pirate was exiled this way, draw a card. | Ben Maier