(Graven Creek isn't a spell.)
Graven Creek enters the battlefield tapped unless you pay .
, : You may put a land card from your hand onto the battlefield.
: Add or to your mana pool.
: Add to your mana pool. Put Graven Creek on top of your library.
.
, 
: You may put a land card from your hand onto the battlefield.: Add 
or 
to your mana pool.: Add to your mana pool. Put Graven Creek on top of your library.
