| 3/19/2021 |
Urborg, Tomb of Yawgmoth isn't a Swamp while it's not on the battlefield. |
| 3/19/2021 |
Land cards not on the battlefield aren't Swamps while Urborg is on the battlefield. |
| 3/19/2021 |
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. |
| 3/19/2021 |
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. |
|