All 26 Combos with Urborg, Tomb of Yawgmoth

Kormus Bell + Urborg, Tomb of Yawgmoth + Elesh Norn, Grand Cenobite

Lock: Opponents can't have lands on the battlefield, Lock, Mass Land Denial

All lands are swamps with Urborg, Tomb of Yawgmoth. All swamps are 1/1 creatures with Kormus bell. All opponent creatures get -2/-2 from Elesh Norn, Grand Cenobite. Each opponent lands can not be played.

Cards: Kormus Bell, Urborg, Tomb of Yawgmoth, Elesh Norn, Grand Cenobite

Kormus Bell + Urborg, Tomb of Yawgmoth + Kaervek, the Spiteful

Lock: Destroy all lands, Destroy all lands that enter the battlefield, Lock, Mass Land Denial