Good Path Wrong

When Good Path Wrong enters the battlefield if only black mana was spent to
cast it, sacrifice it, if you do, draw 2 cards
and lose 2 life.
Whenever a mountain, plains, or forest
enters the battlefield under your control,
you gain 1 life, whenever a swamp enters the battlefield under your control, you lose 1 life.
"What is this? Some kind of immobile fungus?"