(: Add or to your mana pool.)
When Swamp Tower enters the battlefield, sacrifice it unless you pay 2 life.
: Swamp Tower becomes a 2/1 black and white Wizard creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Swamp Tower becomes a 2/1 black and white Wizard creature until end of turn. It's still a land.
