(: Add or to your mana pool.)
Calciform Tar Pit enters the battlefield tapped unless you pay .
: Calciform Tar Pit becomes a 0/4 white and black Bird creature with defender until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
.: Calciform Tar Pit becomes a 0/4 white and black Bird creature with defender until end of turn. It's still a land.
