When your opponent activates a card or effect that targets another card(s) you control: Return 1 of those cards you control to the hand (if face-down, reveal it), and if you do, destroy 1 card on the field, then you can Special Summon 1 monster that mentions "Ritual of Light and Darkness" from your hand, with a different name than the returned card, ignoring its Summoning conditions.
If this card in its owner's possession is destroyed by an opponent's card: You can Special Summon 1 Ritual Monster that mentions "Ritual of Light and Darkness" from your hand or Deck.