(: Add or to your mana pool.)
Mistveil Cavern enters the battlefield tapped.
: Mistveil Cavern becomes a 2/1 white and black Citizen creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Mistveil Cavern becomes a 2/1 white and black Citizen creature until end of turn. It's still a land.
