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 $152.22. Over the trailing 90 days the price moved between $4.56 and $152.22 across 44 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 2 catalogued treatments from PUMA — the lineup includes Extended Art 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 #U40 of *Ultimate Box Topper*, the set that shipped alongside the December 2018 Ultimate Box Topper release.
Card type: Legendary Land, printed at mythic. Mythic rares historically land in roughly one out of every eight boosters at standard print densities.
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.
