(Gilt-Leaf River isn't a spell.)
Gilt-Leaf River enters the battlefield tapped.
: Target player exiles a card from his or her graveyard.
: Add or to your mana pool.
Sacrifice Gilt-Leaf River: Add or to your mana pool.
: Target player exiles a card from his or her graveyard.: Add 
or 
to your mana pool. or to your mana pool.
