(: Add or to your mana pool.)
When Flat Ravine enters the battlefield, sacrifice it unless you pay .
: Flat Ravine becomes a 2/2 white Spirit Kor creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.).
: Flat Ravine becomes a 2/2 white Spirit Kor creature until end of turn. It's still a land.
