(: Add or to your mana pool.)
Cinder Oasis enters the battlefield tapped.
: Cinder Oasis becomes a 2/2 red Goblin creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.)
: Cinder Oasis becomes a 2/2 red Goblin creature until end of turn. It's still a land.
