What does urborg tomb of yawgmoth do in magic the gathering?

Answer 1

When Urborg Tomb of Yawgmoth is in play all lands are swamps in addition to their normal land type(s.) This card is a rare non-basic land and works great in a deck built around Angry Mob and Nightmare. A great multi-purpose land combo is Urborg, Tomb of Yawgmoth coupled with Gemstone Mine. Gemstone Mine is sacced after 3 taps normally, but if you have Urborg-Tomb Yawgmoth out then Gemstone Mine can be tapped for black w/out removing a mining counter from it, so that combo comes out looking like a pumped up vivid swamp. Throw in some Reflecting Pools and you can tap off any color w/outout losing mining counters