(: Add or to your mana pool.)
Howltooth Canopy enters the battlefield tapped unless you sacrifice a Green permanent.
: Howltooth Canopy becomes a 2/1 black and green Rat creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.): Howltooth Canopy becomes a 2/1 black and green Rat creature until end of turn. It's still a land.
