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.