(: Add or to your mana pool.)
Sunken Prairie enters the battlefield tapped.
: Sunken Prairie becomes a 0/4 white and blue Cephalid creature with defender until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
: Sunken Prairie becomes a 0/4 white and blue Cephalid creature with defender until end of turn. It's still a land.
