"VWXYZ-Dragon Catapult Cannon" + "Armed Dragon LV7"
Must first be Special Summoned (from your Extra Deck) during a Duel you Special Summoned both the above cards, by banishing the above cards from your field and/or GY. (You do not use "Polymerization".) Your opponent cannot activate cards or effects with the same name as any banished card. Once per turn, during your opponent's turn (Quick Effect): You can banish 1 card from your Deck or Extra Deck, face-up; banish all cards your opponent control and in their GY.