When Swamp Stadium enters the battlefield, sacrifice it unless you pay 2 life.
: Add to your mana pool. Swamp Stadium doesn't untap during your next untap step.
: Swamp Stadium becomes a 2/2 white Bird creature until end of turn. It's still a land.
: Add 
to your mana pool. Swamp Stadium doesn't untap during your next untap step.
: Swamp Stadium becomes a 2/2 white Bird creature until end of turn. It's still a land.
