Heart of the World

(Heart of the World enters the battlefield tapped.)
{t}: Add {g} or {w}.
{g}, {t}: Put a +1/+1 counter on target creature
you control. If that creature is legendary, put two
+1/+1 counters on it instead.
{w}, {t}: Exile target creature card from a graveyard.
You gain life equal to its power. If it was a
legendary creature card, you gain life equal to its
power and toughness.