Number C9: Chaos Dyson Sphere [PGLD-EN022] Gold Secret Rare

3 Level 10 monsters At the start of the Damage Step, if this card battles an opponent's monster: You can attach that monster to this card as a face-up Xyz Material. Once per turn: You can inflict 300 damage to your opponent for each Xyz Material attached to this card. If this card has "Number 9: Dyson Sphere" as an Xyz Material, it gains this effect. ? Once per turn: You can detach any number of Xyz Materials from this card; inflict 800 damage to your opponent for each Xyz Material detached.