Healing Seraph

As an additional cost to cast this spell, discard a black card or sacrifice a black creature. Flying, Lifelink When Healing Seraph enters, target opponent loses life equal to the number of creature cards in all graveyards. When Healing Seraph leaves the battlefield, you may return a creature or artifact card from your graveyard to the battlefield with mana value equal to or less than the amount of life you gained this turn.