Spirit Converter [REDU-EN099] Secret Rare

Once per turn: You can target 1 Xyz Monster you control; attach 1 face-up Level 4 LIGHT monster you control to that target as an Xyz Material. When this card is sent from the field to the Graveyard: Target 2 Level 4 LIGHT Thunder-Type monsters with the same name in your Graveyard, add those targets to your hand.