All non-basic lands, including Urborg, lose their abilities and gain the ability to produce red mana. Urborg loses the ability “Each land is a Swamp …” Final result: Blood Moon is applied, Urborg is like it didn’t exist. All non-basic lands, including Urborg, are Mountains, aren’t Swamps, and can only produce red mana.

Can urborg tomb of yawgmoth be tapped for mana?

Can I tap urborg, tomb of yawgmoth for mana? Yes. It turns itself into a swamp, which means it can tap for black mana.

Is Urborg a land?

One of the few Modern-legal lands printed without a native mana ability, Urborg can still tap for black because it makes itself a Swamp. It sees some play in Legacy, and has a big role in Commander, powering up other lands like Cabal Coffers and Cabal Stronghold.

Does Urborg affect lands in hand?

Urborg only affects lands currently on the battlefield (even if it does not explicitly say so), all lands in each player’s hand, deck, graveyard, or exile do not gain the type “Swamp”.

Does urborg affect lands in the deck?

Unless explicitly stated otherwise, a permanent only affects permanents on the battlefield. Urborg Tomb of Yawgmoth only affects lands on the battlefield, not land cards in your hand, graveyard, library, or exile (or anywhere else a land might be…).

Does urborg affect lands not in play?

No. Urborg, Tomb of Yawgmoth only affects lands on the battlefield, not in any other zone.

Is Yavimaya cradle of growth a forest?

Yavimaya, Cradle of Growth isn’t a Forest while it’s not on the battlefield. Land cards not on the battlefield aren’t Forests while Yavimaya is on the battlefield.

Does urborg effect lands in your deck?

Urborg affects all lands. A fetch land that is currently in your library, hand, graveyard, etc. is a land card, not a land. A land card doesn’t become a land until it’s on the battlefield, so Urborg doesn’t affect anything in your hand or library.

What does urborg’s ability on tomb of Yawgmoth do?

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.

Is the tomb of Yawgmoth a swamp or a land?

Each land is a Swamp in addition to its other land types. “Yawgmoth’s corpse is a wound in the universe. His foul blood seeps out, infecting the land with his final curse.” Urborg, Tomb of Yawgmoth isn’t a Swamp while it’s not on the battlefield. Land cards not on the battlefield aren’t Swamps while Urborg is on the battlefield.

What happens when urborg is not on the battlefield?

Land cards not on the battlefield aren’t Swamps while Urborg is on the battlefield. Urborg’s ability causes each land on the battlefield to have the land type Swamp.

How does urborg turn all lands into swamps?

Urborg turns all lands into Swamps, and all lands can produce black mana. The fact that all lands become Swamps “in addition to other land types” is very important: if Urborg didn’t say this, all the lands would be just Swamps.