(: Add or to your mana pool.)
When Swamp-works enters the battlefield, return a land you control to its owner's hand.
, Sacrifice a Swamp: Add to your mana pool.
, : Counter target spell unless its controller pays .
: Add 
or 
to your mana pool.), Sacrifice a Swamp: Add to your mana pool.
, : Counter target spell unless its controller pays .
