Graven Cairns enters the battlefield tapped unless you pay .
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
: Return Graven Cairns to its owner's hand.
.
: Add 
to your mana pool. If you played a land this turn, Add 
to your mana pool instead.: Return Graven Cairns to its owner's hand.
