Mountain Flats enters the battlefield tapped unless you pay .
: Add or to your mana pool.
: Mountain Flats becomes a 2/1 red and white Goblin creature until end of turn. It's still a land.
.
: Add 
or 
to your mana pool.: Mountain Flats becomes a 2/1 red and white Goblin creature until end of turn. It's still a land.
