The Lost Caverns of Ixalan

Bedrock Tortoise | Creature | Turtle | As long as it's your turn, creatures you control have hexproof. Each creature you control with toughness greater than its power assigns combat damage equal to its toughness rather than its power. | Maxime Minard

Colossadactyl | Creature | Dinosaur | Reach, trample | Campbell White

Hulking Raptor | Creature | Dinosaur | Ward {2} At the beginning of your precombat main phase, add {G}{G}. | Nestor Ossandon Leal

Mineshaft Spider | Creature | Spider | Reach When Mineshaft Spider enters the battlefield, you may mill two cards. (You may put the top two cards of your library into your graveyard.) | Sam Rowan

Pathfinding Axejaw | Creature | Dinosaur | When Pathfinding Axejaw 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.) | Raoul Vitale

Sovereign Okinec Ahau | Legendary Creature | Cat Noble | Ward {2} Whenever Sovereign Okinec Ahau attacks, for each creature you control with power greater than that creature's base power, put a number of +1/+1 counters on that creature equal to the difference. | Victor Adame Minguez

Deepfathom Echo | Creature | Merfolk Spirit | At the beginning of combat on your turn, Deepfathom Echo explores. Then you may have it become a copy of another creature you control until end of turn. (To have this creature explore, 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.) | Matt Stewart