(: Add or to your mana pool.)
Green of the Burnwillows enters the battlefield tapped.
: Green of the Burnwillows becomes a 2/1 green and red Stag creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Green of the Burnwillows becomes a 2/1 green and red Stag creature until end of turn. It's still a land.
