2 Level 7 Dragon-Type monsters
If you can Pendulum Summon Level 7, you can Pendulum Summon this face-up card in your Extra Deck. If this card is Xyz Summoned by using an Xyz Monster as a Material: Destroy as many Level 7 or lower monsters your opponent controls as possible, inflict 1000 damage to your opponent for each card destroyed, and if you do, this card can make 3 attacks during each Battle Phase this turn. If this card in the Monster Zone is destroyed by battle or card effect: You can destroy as many cards in your Pendulum Zones as possible (min. 1), and if you do, place this card in your Pendulum Zone.

Pendulum Scale: 4
Pendulum Effect: Once per turn, if you have no cards in your other Pendulum Zone: You can place 1 Pendulum Monster from your Deck in your Pendulum Zone.