Rivals of Ixalan

Moment of Triumph | Instant | | Target creature gets +2/+2 until end of turn. You gain 2 life. | Steven Belledin

Snubhorn Sentry | Creature | Dinosaur | Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.) Snubhorn Sentry gets +3/+0 as long as you have the city's blessing. | Aaron Miller

Mist-Cloaked Herald | Creature | Merfolk Warrior | Mist-Cloaked Herald can't be blocked. | Anthony Palumbo

Sea Legs | Enchantment | Aura | Flash Enchant creature Enchanted creature gets +0/+2 as long as it's a Pirate. Otherwise, it gets -2/-0. | Deruchenko Alexander

Grasping Scoundrel | Creature | Human Pirate | Grasping Scoundrel gets +1/+0 as long as it's attacking. | Steve Prescott

Fanatical Firebrand | Creature | Goblin Pirate | Haste {T}, Sacrifice Fanatical Firebrand: It deals 1 damage to any target. | Wayne Reynolds

Mutiny | Sorcery | | Target creature an opponent controls deals damage equal to its power to another target creature that player controls. | Gabor Szikszai

Jade Bearer | Creature | Merfolk Shaman | When Jade Bearer enters the battlefield, put a +1/+1 counter on another target Merfolk you control. | Alex Konstad

Traveler's Amulet | Artifact | | {1}, Sacrifice Traveler's Amulet: Search your library for a basic land card, reveal it, put it into your hand, then shuffle. | Yeong-Hao Han