Tree Retreat enters the battlefield tapped unless you pay .
, Pay 1 life: Add or to your mana pool.
, , Sacrifice Tree Retreat: Draw a card.
: Tree Retreat becomes a 1/1 green and blue Bear creature with flying until end of turn. It's still a land.
.
, Pay 1 life: Add 
or 
to your mana pool., , Sacrifice Tree Retreat: Draw a card.: Tree Retreat becomes a 1/1 green and blue Bear creature with flying until end of turn. It's still a land.
