Simultaneous Equation Cannons

Banish 2 Xyz Monsters with the same Rank and 1 Fusion Monster from your Extra Deck whose combined Levels and Ranks equal the total number of cards on the field and in both player's hands, then you can return 1 each of your banished Fusion and Xyz Monsters to the Extra Deck whose combined Level and Rank equal the Level or Rank of 1 face-up monster your opponent controls, then banish all cards your opponent controls.