Land - Island Mountain {T}: Add either {U} or {R} to your mana pool. Counts as both islands and mountains and is affected by spells that affect either. If a spell destroys one of these land types, this card is destroyed; if a spell alters one of these land types, the other land type is unaffected.1
10/1/2008: This has the mana abilities associated with both of its basic land types.
10/1/2008: This has basic land types, but it isn't a basic land. Things that affect basic lands don't affect it. Things that affect basic land types do.