(Sunpetal Ravine isn't a spell.)
When Sunpetal Ravine enters the battlefield, sacrifice it unless you pay 3 life.
All creatures have Islandwalk.
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
: Add 
to your mana pool. If you played a land this turn, Add 
to your mana pool instead.
