You can only activate 1 card with this card’s name per turn.
(1) During the Main Phase: Fusion Summon 1 Fusion Monster that lists “Blue-Eyes White Dragon” or “Blue-Eyes Ultimate Dragon” as material, by shuffling Fusion Materials listed on it from your hand, field, or GY into the Deck, including at least 1 “Blue-Eyes White Dragon” or “Blue-Eyes Ultimate Dragon”, then you can destroy face-up cards your opponent controls up to the number of “Blue-Eyes White Dragon” and “Blue-Eyes Ultimate Dragon” as material from the field.