Superdreadnought Rail Cannon Gustav Max [JUMP-EN062] Ultra Rare Fiend If this card is Fusion

If this card is Fusion Summoned using 5 Spellcaster monsters with different names: You can destroy all cards your opponent controls

During the next Standby Phase after this face-up card is destroyed and sent to the Graveyard: You can discard 1 card

Must be Special Summoned (from your hand) by Tributing 1 "Blue-Eyes Ultimate Dragon"

then you can destroy 1 Spell/Trap your opponent controls

Superdreadnought Rail Cannon Gustav Max [JUMP-EN062] Ultra Rare Fiend If this card is FusionSet: Shonen Jump Magazine Promos Card type: Xyz Effect Monster Rarity: Ultra Rare Attack: 3000 Defense: 3000 2 Level 10 monsters Once per turn: You can detach 1 Xyz Material from this card; inflict 2000 damage to your opponent.