When Calciform Swamp enters the battlefield, return a land you control to its owner's hand.
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
, , Sacrifice Calciform Swamp: Destroy target monocolored permanent.
: Add 
to your mana pool. If you played a land this turn, Add 
to your mana pool instead.
, , Sacrifice Calciform Swamp: Destroy target monocolored permanent.
