Simultaneous Equation Cannon

Normal Trap

[1] Banish 2 Xyz monsters with the same Rank and 1 Fusion monster from your Extra Deck, whose total Ranks and Level equal the total number of cards on the field and in both players hands, then you can return 1 Xyz and 1 Fusion monster from your banished cards to the Extra Deck, whose total Rank and Level equals the Level or Rank of 1 face-up monster your opponent controls, then banish all cards your opponent controls.