Glacial Crasher
Oracle Text
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Glacial Crasher can't attack unless there is a Mountain on the battlefield.
Card Rulings
7/18/2014 It doesn’t matter who controls the Mountain.
7/18/2014 If the only Mountains on the battlefield leave the battlefield after Glacial Crasher attacks, it stays attacking.
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