The Lost Caverns of Ixalan

Malamet War Scribe | Creature | Cat Warrior | When Malamet War Scribe enters the battlefield, creatures you control get +2/+1 until end of turn. | Nicholas Gregory

Master's Guide-Mural | Artifact | | When Master's Guide-Mural enters the battlefield, create a 4/4 white and blue Golem artifact creature token. Craft with artifact {4}{W}{W}{U} ({4}{W}{W}{U}, 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.) | Racrufi