Urborg's ability causes each land on the battlefield to have the land type Swamp. Any land that's a Swamp has the ability "{T}: Add {B}." Nothing else changes about those lands, including their names, other subtypes, other abilities, and whether they're legendary, basic, or snow.
If an effect such as that of Magus of the Moon causes Urborg to lose its abilities by setting it to a basic land type not in addition to its other types, it won't turn lands into Swamps, no matter in what order those effects started to apply.
Urborg, Tomb of Yawgmoth isn't a Swamp while it's not on the battlefield.
Last observed on Scryfall 2 months ago at $60.55. Over the trailing 90 days the price moved between $0.19 and $61.04 across 58 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 3 catalogued treatments from UMA — the lineup includes Foil and Nonfoil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #254 of *Ultimate Masters*, the set that shipped alongside the December 2018 Ultimate Masters release.
Card type: Legendary Land, printed at rare. Rares occupy the bottom-of-pack rare slot in standard boosters.
Legal across the major constructed formats — Modern, Legacy, Vintage, and Commander — plus Standard rotation play.
EDHrec ranks this card #72 in Commander, putting it in the format-staple tier of the format's playable pool.
Illustrated by Jung Park. Rarix catalogs 370 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Jung Park
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
Land cards not on the battlefield aren't Swamps while Urborg is on the battlefield.
