Dragonskull Summit

Land   

Dragonskull Summit enters the battlefield tapped unless you control a Swamp or a Mountain. : Add or to your mana pool.

223 M10 • ENJon Foster

™ & © 1993—2009 Wizards of the Coast

Legal in: Pioneer,Modern,Legacy,Vintage,Commander

Oracle Text (click to copy):

Dragonskull Summit Land Dragonskull Summit enters the battlefield tapped unless you control a Swamp or a Mountain. {T}: Add {B} or {R} to your mana pool.

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View this MTG card on Gatherer

10/1/2009
This checks for lands you control with the land type Swamp or Mountain, not for lands named Swamp or Mountain. The lands it checks for don't have to be basic lands. For example, if you control Stomping Ground (a nonbasic land with the land types Mountain and Forest), Dragonskull Summit will enter the battlefield untapped.
10/1/2009
As this is entering the battlefield, it checks for lands that are already on the battlefield. It won't see lands that are entering the battlefield at the same time (due to Warp World, for example).

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