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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.

3 Level 8 monsters
You can also Xyz Summon this card by using a "Galaxy-Eyes" Xyz Monster you control as material, except "Galaxy-Eyes Full Armor Photon Dragon". (Transfer its materials to this card.) Once per turn: You can target up to 2 Equip Cards equipped to this card; attach them to this card as material. Once per turn: You can detach 1 material from this card, then target 1 face-up card your opponent controls; destroy it.