Urborg, Tomb of Yawgmoth
Legendary Land
Each land is a Swamp in addition to its other land types.
Illustrated by
The Zeta Set#242MythicEnglishLegality
Rulings
Dec 7, 2018
Urborg, Tomb of Yawgmoth isn’t a Swamp while it’s not on the battlefield.
Dec 7, 2018
Land cards not on the battlefield aren’t Swamps while Urborg is on the battlefield.
Dec 7, 2018
Urborg’s ability causes each land on the battlefield to have the land type Swamp. Any land that’s a Swamp has the ability “
: Add 
.” Nothing else changes about those lands, including their names, other subtypes, other abilities, and whether they’re legendary, basic, or snow.