Rivals of Ixalan

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

Dire Fleet Neckbreaker | Creature | Orc Pirate | Attacking Pirates you control get +2/+0. | Daarken

Raging Regisaur | Creature | Dinosaur | Whenever Raging Regisaur attacks, it deals 1 damage to any target. | Bayard Wu