Gravity Behemoth [CP08-EN001] Ultra Rare Anniversary Pack by using this face-up card

by using this face-up card you control as the Xyz Material

your opponent cannot select a face-down Defense Position monster as an attack target

destroy them

Set: Shonen Jump Magazine Promos Card type: Effect Monster Rarity: Ultra Rare Attack: 0 Defense: 0 This card cannot be Special Summoned

Gravity Behemoth [CP08-EN001] Ultra Rare Anniversary Pack by using this face-up cardSet: Champion Pack 8 Card type: Effect Monster Rarity: Ultra Rare Attack: 2300 Defense: 2000 If it is not the first turn of the Duel and there are no cards on the field, you can Normal Summon this card without Tributing. You can destroy all Field Spell Cards on the field. This card cannot attack the turn you activate this effect.