Forest Tubes enters the battlefield tapped unless you sacrifice an artifact creature.
, Pay 1 life: Add or to your mana pool.
, , Sacrifice Forest Tubes: Draw a card.
: Target 1/1 creature gets +1/+0 until end of turn.
, Pay 1 life: Add 
or 
to your mana pool.
, , Sacrifice Forest Tubes: Draw a card.: Target 1/1 creature gets +1/+0 until end of turn.
