The Lost Caverns of Ixalan

Brazen Blademaster | Creature | Orc Pirate | Whenever Brazen Blademaster attacks while you control two or more artifacts, it gets +2/+1 until end of turn. | Jarel Threat

Etali's Favor | Enchantment | Aura | Enchant creature you control When Etali's Favor enters the battlefield, discover 3. (Exile cards from the top of your library until you exile a nonland card with mana value 3 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.) Enchanted creature gets +1/+1 and has trample. | Matt Stewart

Hotfoot Gnome | Artifact Creature | Gnome | Haste {T}: Another target creature gains haste until end of turn. | Svetlin Velinov

Idol of the Deep King | Artifact | | Flash When Idol of the Deep King enters the battlefield, it deals 2 damage to any target. Craft with artifact {2}{R} ({2}{R}, Exile this artifact, Exile another artifact you control or an artifact card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.) | Matteo Bassini

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