When Mosswort Swamp enters the battlefield, sacrifice it unless you pay .
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
: Return Mosswort Swamp to its owner's hand.
.
: Add 
to your mana pool. If you played a land this turn, Add to your mana pool instead.: Return Mosswort Swamp to its owner's hand.
