Roaming Throne is a rare Artifact Creature — Golem card from The Lost Caverns of Ixalan Promos (PLCI), collector number 258p. Current market price: $50.99 (foil $50.37), TCGplayer market prices via Scryfall.
Ward {2} As this creature enters, choose a creature type. This creature is the chosen type in addition to its other types. If a triggered ability of another creature you control of the chosen type triggers, it triggers an additional time.