Tree Vents enters the battlefield tapped.
: Add or to your mana pool.
Sacrifice Tree Vents: Add or to your mana pool.
: Tree Vents becomes a 1/1 green and blue Leech creature with flying until end of turn. It's still a land.
: Add 
or 
to your mana pool. or to your mana pool.
: Tree Vents becomes a 1/1 green and blue Leech creature with flying until end of turn. It's still a land.
