MP17-EN158 – Double Cipher – Common – 1st Edition

If your opponent controls a monster with the highest ATK on the field (even if tied): Target 1 ‘Galaxy-Eyes’ or ‘Cipher’ Xyz Monster you control that has Xyz Material; detach all Xyz Materials from that Xyz Monster, and if you do, Special Summon 1 monster from your Extra Deck with the same name as that Xyz Monster.