Revitalizing Waters

If you payed more {u} to cast Revitalizing Waters, draw a card and reveal it. You gain life equal to its converted mana cost.
If you payed more {g} to cast Revitalizing Waters, untap target land. You gain life equal to the number of untapped lands you control.
If you payed an equal amount of {u} and {g} to cast Revitalizing Waters, you gain 5 life.