مدفع نظام المعادلة

Banish 2 Xyz Monsters with the same Rank and 1 Fusion Monster from your Extra Deck, whose combined Levels/Ranks equal the total number of cards on the field and in both players' hands, then you can apply this effect.
● Return 2 of your banished monsters (1 Xyz Monster and 1 Fusion Monster) to the Extra Deck, whose combined Level/Rank equals the Level/Rank of 1 face-up monster your opponent controls, then banish all cards your opponent controls.