Glacial Fortress

Land
Glacial Fortress enters the battlefield tapped unless you control a Plains or an Island.

{T}: Add {W} or {U} to your mana pool.
Illus. Franz Vohwinkel

Gatherer Card Rulings [Nov 2009]

• 10/1/2009: This checks for lands you control with the land type Plains or Island, not for lands named Plains or Island. The lands it checks for don't have to be basic lands. For example, if you control Watery Grave (a nonbasic land with the land types Island and Swamp), Glacial Fortress 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).

Format Legality	Legal in Vintage, Legacy, Extended, Standard, MTGO Classic
Printings (1/9)	Magic 2010 (Rare)