(Calciform of the Burnwillows isn't a spell.)
When Calciform of the Burnwillows enters the battlefield, you lose 2 life unless you reveal a Spirit card from your hand.
Sacrifice a land: You gain 1 life.
: Add
or
to your mana pool.
Put Calciform of the Burnwillows on top of your library: Add
to your mana pool.