(Rustic Ravine isn't a spell.)
Rustic Ravine enters the battlefield tapped.
Red creatures get +2/-1.
: Add or to your mana pool.
: Add to your mana pool. Put Rustic Ravine on top of your library.
: Add 
or 
to your mana pool.: Add 
to your mana pool. Put Rustic Ravine on top of your library.
