Tree Knoll enters the battlefield tapped unless you pay .
, Pay 1 life: Add or to your mana pool.
, , Sacrifice Tree Knoll: Draw a card.
: Tree Knoll becomes a 2/2 red Beast Shaman creature until end of turn. It's still a land.
.
, Pay 1 life: Add 
or 
to your mana pool., , Sacrifice Tree Knoll: Draw a card.
: Tree Knoll becomes a 2/2 red Beast Shaman creature until end of turn. It's still a land.
