Simultaneous Equation Cannons (LEDE-EN080) [Legacy of Destruction]

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