Ixalan

Adanto Vanguard | Creature | Vampire Soldier | As long as Adanto Vanguard is attacking, it gets +2/+0. Pay 4 life: Adanto Vanguard gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.) | Anna Steinbauer

River Sneak | Creature | Merfolk Warrior | River Sneak can't be blocked. Whenever another Merfolk enters the battlefield under your control, River Sneak gets +1/+1 until end of turn. | Slawomir Maniak

Storm Fleet Aerialist | Creature | Human Pirate | Flying Raid — Storm Fleet Aerialist enters the battlefield with a +1/+1 counter on it if you attacked this turn. | Jesper Ejsing

Kitesail Freebooter | Creature | Human Pirate | Flying When Kitesail Freebooter enters the battlefield, target opponent reveals their hand. You choose a noncreature, nonland card from it. Exile that card until Kitesail Freebooter leaves the battlefield. | Dan Scott

Seekers' Squire | Creature | Human Scout | When Seekers' Squire 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.) | Anthony Palumbo

Wanted Scoundrels | Creature | Human Pirate | When Wanted Scoundrels dies, target opponent creates two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.") | Volkan Baǵa

Otepec Huntmaster | Creature | Human Shaman | Dinosaur spells you cast cost {1} less to cast. {T}: Target Dinosaur gains haste until end of turn. | Daarken

Raptor Hatchling | Creature | Dinosaur | Enrage — Whenever Raptor Hatchling is dealt damage, create a 3/3 green Dinosaur creature token with trample. | Even Amundsen

Wily Goblin | Creature | Goblin Pirate | When Wily Goblin enters the battlefield, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") | Steve Prescott

Drover of the Mighty | Creature | Human Druid | Drover of the Mighty gets +2/+2 as long as you control a Dinosaur. {T}: Add one mana of any color. | Eric Deschamps

Merfolk Branchwalker | Creature | Merfolk Scout | When Merfolk Branchwalker 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.) | Kieran Yanner

Wildgrowth Walker | Creature | Elemental | Whenever a creature you control explores, put a +1/+1 counter on Wildgrowth Walker and you gain 3 life. | Ryan Alexander Lee

Sky Terror | Creature | Dinosaur | Flying, menace | Johann Bodin

Dire Fleet Captain | Creature | Orc Pirate | Whenever Dire Fleet Captain attacks, it gets +1/+1 until end of turn for each other attacking Pirate. | Yongjae Choi