When Timberline Atoll enters the battlefield, you lose 1 life unless you reveal a land card from your hand.
When Timberline Atoll enters the battlefield, put a land you control on the bottom of its owner's library.
: Add 
to your mana pool.
: Timberline Atoll becomes a 2/2 blue Shapeshifter creature until end of turn. It's still a land.