The Dark - Hex-Sealed Fusion [LCYW-EN263] Common XY139 you can negate the effects

you can negate the effects of all face-up monsters your opponent controls

attach this card to it as additional Xyz Material

You can only use this effect of "Number 76: Harmonizer Gradielle" once per turn

Set: Legacy of the Valiant Card type: Xyz/Effect Monster Rarity: Ultra Rare Attack: 2300 Defense: 3200 2 Level 8 monsters Once per turn: You can declare 1 card name

The Dark - Hex-Sealed Fusion [LCYW-EN263] Common XY139 you can negate the effectsSet: Legendary Collection 3: Yugi's World Card type: Effect Monster Rarity: Common Attack: 1000 Defense: 1600 You can substitute this card for any 1 Fusion Material Monster, but the other Fusion Material Monster(s) must be correct. You can Tribute Fusion Material Monsters on the field, including this face up card; Special Summon 1 corresponding DARK Fusion Monster from your Extra Deck.