Miracle Raven

You can Ritual Summon this card with "Miracle Raven". Must be Ritual Summoned. This Ritual Summoned card is unaffected by your opponent's activated effects. If you Ritual Summon exactly 1 Ritual Monster with a card effect that requires use of monsters, this card you control can be used as the entire Tribute. If this card is Tributed for a Ritual Summon: You can add 1 Ritual Monster from your Deck to your hand. You can only use this effect of "Miracle Raven" once per turn.