Palladium Oracle Mana (Prismatic Secret Rare)

When your opponent activates a card or effect that targets 1 Spellcaster monster you control (and no other cards), while this card is in your hand or GY (Quick Effect): You can Special Summon this card. You can only use this effect of Palladium Oracle Mana once per turn. Level 7 or higher Spellcaster monsters you control cannot be destroyed by card effects. If this card is destroyed by battle or card effect: You can Special Summon 1 Dark Magician Girl from your hand, Deck, or GY.