(Overgrown Crag isn't a spell.)
Overgrown Crag enters the battlefield tapped unless you pay .
Sacrifice a land: You gain 1 life.
: Add or to your mana pool.
: Add to your mana pool. Put Overgrown Crag on top of your library.
.
: Add 
or 
to your mana pool.: Add 
to your mana pool. Put Overgrown Crag on top of your library.
