(: Add or to your mana pool.)
When Swamp Ring enters the battlefield, return a land you control to its owner's hand.
: Swamp Ring becomes a 1/1 black and red Skeleton creature with first strike until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
: Swamp Ring becomes a 1/1 black and red Skeleton creature with first strike until end of turn. It's still a land.
