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3 Level 8 monsters
Once per turn, you can also Xyz Summon "Neo Galaxy-Eyes Photon Dragon - Photon Howling" by using 1 Rank 8 Xyz Monster you control (transfer its materials). If this card is Xyz Summoned: You can take 1 "Photon" monster from your Deck, and either Special Summon it in Defense Position or attach it to this card as material. (Quick Effect): You can detach 3 materials from this card; Tribute 1 other Xyz Monster, and if you do, negate the effects of all other face-up cards currently on the field until the end of this turn.

2 Level 8 Dragon monsters
Cannot attack directly unless this card has a Normal Monster as material. You can only use each of the following effects of "Indigo-Eyes Silver Dragon" once per turn. If this card is Xyz Summoned: You can negate the effects of all face-up cards your opponent currently controls. You can detach 1 material from this card, then target 1 Normal Monster in your GY or banishment; Special Summon it, and if you do, it gains 1000 ATK.