Crag Pool enters the battlefield tapped unless you pay .
: Add or to your mana pool.
: Add to your mana pool. Put Crag Pool on top of your library.
Cycling (, Discard this card: Draw a card.)
.
: Add or 
to your mana pool.: Add 
to your mana pool. Put Crag Pool on top of your library. (, Discard this card: Draw a card.)
