(: Add or to your mana pool.)
When Tranquil Reef enters the battlefield, sacrifice it unless you pay 3 life.
: Tranquil Reef becomes a 1/1 white and blue Spirit creature with flying until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
: Tranquil Reef becomes a 1/1 white and blue Spirit creature with flying until end of turn. It's still a land.
