This card can work well with "Debris Dragon". Summon "Debris Dragon" and special summon this card, and then Synchro Summon "Black Rose Dragon" to clear the field. After that, you can ritual summon a monster by banishing "Prognosticator" and any other Djinns of Rituals, and get a powerful direct attack (and a discard from your opponent, thanks to "Prognosticator").