Lightray Diabolos (SDLI-EN017) [Structure Deck: Realm of Light]

Cannot be Normal Summoned or Set. Must first be Special Summoned (from your hand) by having 5 or more LIGHT monsters with different names in your Graveyard. Once per turn: You can banish 1 LIGHT monster from your Graveyard to target 1 Set card your opponent controls; reveal that target, then return that target to either the top or bottom of the Deck.